The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board > The 1973 - 1991 Blazers, Jimmys, and Suburbans Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-13-2019, 11:04 AM   #26
Ski-me
Registered User
 
Ski-me's Avatar
 
Join Date: May 2012
Location: Colo Springs, CO
Posts: 813
Re: Daily Driving a Square Suburban

Every truck is a little different but I've gotten 32x11.5r15 and 33x12.5r15 on stock height trucks. I did have to hammer in the inside lip of the front fenders. And I also have to be a little gentle turning if the suspension is moving a bit, due to bumps. The rears tend to sag due to time, so adding a zero-rate lift spring helps level it out (1" block really).

I have a 2.5" lift and have 35x12.5r15's on stock rally wheels. No issues. I run 4.10's and it's pretty decent. Much better than the original 3.42's.
__________________
- Jeff

89' K5 Blazer, 2.5" lift, 35" tires
04' GMC Yukon XL, 3/4 ton, 8.1L
Ski-me is offline   Reply With Quote
Old 03-13-2019, 11:13 AM   #27
skyphix
Registered User
 
Join Date: Sep 2018
Location: Brooklin, ME
Posts: 179
Re: Daily Driving a Square Suburban

I might not be the best influence, and its not a suburban, but I am 5.3/4L80E Swapping my 1980 C10 specifically so I can 3-season daily drive it. I use Imports or modern cars for the winter, because (generally) they hold up better in the salt/brine thats used here in Maine.

I say go for it - if you love the 'burb you buy, you won't regret it.
__________________
Eric
1980 C10 SWB
skyphix is offline   Reply With Quote
Old 03-13-2019, 12:19 PM   #28
RyanAK
Registered User
 
Join Date: Feb 2013
Location: Mifflinburg, PA
Posts: 54
Re: Daily Driving a Square Suburban

Thanks, Jeff. Seems like 31x10.5 or 32x10.5 wouldn't be an issue. Unless a truck I buy has been recently gone through, the first things I do usually are springs, shocks, tires, swaybars (if absent), brakes. I've never lifted anything because the majority of offroad service here in PA is pretty mild stuff on state forest fire line roads (old logging skid roads) and a stock height 1/2 ton usually will do, but I could see the benefit to something 2.5" or less for a bit of additional clearance and suspension travel. Or a stock 3/4 ton.

Eric... I had originally thought of doing something similar to what you're doing with your C10 (really nice, btw) with Earl. He's lowered 2/2 and rides on rallyes with radials. Stock 3/4 ton springs in back with 2" blocks, 2" drop 1/2 ton springs in front. Bilstein shocks. Swaybars front and back. There was a plan once for an LS swap. Then kids came along. The missing 4th door that never bothered me became a hassle when trying to get toddlers into car seats!

Yeah... I think I'll go for it.
__________________
Ryan
-
Meet 'Earl', '71 C10 Suburban
RyanAK is offline   Reply With Quote
Old 03-13-2019, 02:48 PM   #29
Ryan Hubbard
Senior Member
 
Join Date: Aug 2007
Location: Mission Viejo, CA
Posts: 230
Re: Daily Driving a Square Suburban

Quote:
Originally Posted by Ski-me View Post
^^^^ Love this truck!!

I assume you put in the 4L80e?
Yes, I put the 4L80E, originally came with a turbo 400.

As far as mileage goes, I still get 10 to 12 mpg. Of course here in the west we drive faster on the freeways, I am always commuting at 75 mph when there is no traffic so my fuel mileage shows this. But with the current set up, I am only turning 2500 rpms when I am cruising the freeway at 75 mph.
Ryan Hubbard is offline   Reply With Quote
Old 03-13-2019, 10:49 PM   #30
James Lamb
Registered User
 
Join Date: Mar 2019
Location: Knoxville AL
Posts: 34
Re: Daily Driving a Square Suburban

Undercoating. Yes.I have seen the cheap stuff drip off. But have also used some rubberized undercoating that held up well. Putting the first coat on too thick rather than as 2 or 3 light coats is a problem.

But in high school I bought a 1959 Triumph TR3. Almost the entire drivers floorboard was rusted out. And there were other bad spots too. I was on a budget, to put it lightly. I had to use what I could find lying around the farm to fix it. I cut off the sheet metal from the outside of an old hot water heater that had not made it to the dump, made a new pan. Got a gallon bucket of roofing tar and some mineral spirits, thinned out the tar and spent most of a day under the car painting every surface I could find. That was in about 1981. I still have the car and no rust has penetrated anywhere that was coated in tar.

So it can work. But yes coating everything can be an issue. You just need to find a motivated 18 year old.
James Lamb is offline   Reply With Quote
Old 03-14-2019, 05:18 PM   #31
RyanAK
Registered User
 
Join Date: Feb 2013
Location: Mifflinburg, PA
Posts: 54
Re: Daily Driving a Square Suburban

Roofing tar? Really? What an interesting idea. I mean, it's meant to prevent water from penetrating on a roof, so why not? It would be tough to mentally prepare myself to take roofing tar to a neat old survivor truck... a mental hurdle that probably doesn't even exist to a motivated 18 year old.

Gotta be tons cheaper than any automotive specialty product that tries to do the same thing, too!

Roofing tar and used motor oil. Huh.
__________________
Ryan
-
Meet 'Earl', '71 C10 Suburban
RyanAK is offline   Reply With Quote
Old 03-14-2019, 05:24 PM   #32
mongocanfly
Senior Member
 
Join Date: May 2015
Location: Alabama
Posts: 8,132
Re: Daily Driving a Square Suburban

Roofing tar undercoating must be a old trick....not the first time I've heard of it used for undercoating
__________________
Mongo...aka Greg

1981 c30 lq9 nv4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
1955.1 ls3 tr6060...(under construction)(on hold)
2013 gmc z71. (daily driver)
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
mongocanfly is offline   Reply With Quote
Old 03-15-2019, 04:21 PM   #33
James Lamb
Registered User
 
Join Date: Mar 2019
Location: Knoxville AL
Posts: 34
Re: Daily Driving a Square Suburban

Old? Old?! Dang Mongo, you trying to tell me I'm old? I mean I'm getting there, but still.

Really though, my main point is there's usually more than one way to skin a cat - wait, I'm sure PETA is not going to like that expression - more than one way to accomplish an end goal. Roofing tar ain't sexy, but then how often does someone look under your truck? In a TR3 there's only about 3 1/2 inches of ground clearance, so for sure no one else is ever going to know.

And it is cheap.
James Lamb is offline   Reply With Quote
Old 03-29-2019, 09:11 AM   #34
Wwes
Registered User
 
Join Date: Apr 2017
Location: FL
Posts: 127
Re: Daily Driving a Square Suburban

Hey Ryan,

Earl looks great.

I can only add how I handled the same desire, with the caveat that like you, having owned many GM trucks, each generation gets better.

Instead of going out and buying an older truck that was someone else's memories I decided to buy a new one and create my own memories. When I see a K5 blazer going down the road, I remind myself that I'm driving the modern incarnation of that truck (2016 Yukon) and someday we will look back on this Yukon and think of it fondly like the K5. And it will have been "mine" with "our memories".

Properly tuned carbs drive just fine but I prefer modern tech. No vapor lock, stuck choke, broken throttle linkages, etc. Never mind that the 305/350/454 tech from that era would be outrun by the 4-cylinder that is an option in the 2019 Silverado with double the MPG.

And if I were to go against my own best judgement and do it, I'd go with a 97-99 Suburban for the Vortec 350, dual airbags, and general modern feel. There's a TON of difference between a 88 and a 98. Night and day.

Good luck.
Wwes is offline   Reply With Quote
Old 03-29-2019, 10:09 AM   #35
Keith Seymore
Registered User
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 7,529
Re: Daily Driving a Square Suburban

This '87 square pickup was a daily driver for 30 years and 200,000+ miles. Lil Red retired in November of 2017.

Fuel injected V6, overdrive manual trans, 3.73 gears. Power steering, power disc brakes, air conditioning. Routinely pulled down 22-24 mpg commuting to work.

It was one of the most pleasant vehicles to drive that I have ever owned. Basically it was a "modern" vehicle wrapped in vintage sheet metal.

K
Attached Images
 
__________________
Chevrolet Flint Assembly
1979-1986
GM Full Size Truck Engineering
1986 - Feb 2019
Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926
My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524
Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

Last edited by Keith Seymore; 03-29-2019 at 02:34 PM.
Keith Seymore is offline   Reply With Quote
Old 03-29-2019, 10:42 AM   #36
RyanAK
Registered User
 
Join Date: Feb 2013
Location: Mifflinburg, PA
Posts: 54
Re: Daily Driving a Square Suburban

Hey, Wes. I totally get where you're coming from. I just can't get excited about a new truck and the payment that comes with it. A 97-99 is probably the most reasonable choice (cost, options, comfort, drivetrain, etc.), but I always loved the late-'70s square trucks. Dad had '77 and '85 Suburbans when I was growing up and I'll always be drawn to them. Thanks for the compliment on Earl. I'm gonna miss him.

Really nice truck, Keith. I've said for years that if GM would put a modern drive train and some of the modern conveniences into a vintage-style body, they'd have a home run. That, or make a Suburban in work truck trim for guys that want to use them as trucks with a price-point to match.

I have a really clean '88 located. But still thinking about that '76...

R
__________________
Ryan
-
Meet 'Earl', '71 C10 Suburban
RyanAK is offline   Reply With Quote
Old 04-03-2019, 11:11 AM   #37
nobox351y
Registered User
 
Join Date: May 2016
Location: LeRoy
Posts: 62
Re: Daily Driving a Square Suburban

A little late to the party, but I have been dailying an 87 r20 for 4 years. Replaced the 454 with a 4.8 and then swapped a 5.3 w/ 4l80e to make highway miles a lot more reasonable. Would take it anywhere at this point. Really need to do the 3 point belts in the back for the kids. But plan to keep this truck a long time.

Its perfect for all the interesting side jobs I get into, no payment, 16 mpg cruising at 70 mph, and I feel like I am actually investing in a vehicle as opposed to one depreciating faster than I can type this comment.
Attached Images
 
nobox351y is offline   Reply With Quote
Old 04-03-2019, 11:18 AM   #38
nobox351y
Registered User
 
Join Date: May 2016
Location: LeRoy
Posts: 62
Re: Daily Driving a Square Suburban

Quote:
Originally Posted by RyanAK View Post
H

Really nice truck, Keith. I've said for years that if GM would put a modern drive train and some of the modern conveniences into a vintage-style body, they'd have a home run. That, or make a Suburban in work truck trim for guys that want to use them as trucks with a price-point to match.


R
Key here is the seats need to be able to fold and get an 8' sheet in the back.
nobox351y is offline   Reply With Quote
Old 04-08-2019, 12:29 PM   #39
1976gmc20
Registered User
 
Join Date: May 2015
Location: Montana
Posts: 281
Re: Daily Driving a Square Suburban

Well, just keep in mind that back when these old Suburbans were new that we used them for daily drivers and to haul our kids around. Assuming good repair, they aren't any less capable or safe than originally.

For years we had a 1977 2wd Suburban with a four speed manual. For much of that time we lived up in the mountains of western Colorado and never suffered for lack of 4wd. You just had to be a little bit wise what you got yourself into. Had tire chains but only used them once or twice on the Suburban, in extreme conditions. Traded it for a 1991 4x4 after moving to Montana because anytime you get off the pavement here you are at the mercy of gumbo if it rains a half inch.

I will say that if running an older vehicle, you pretty much need to have some sort of backup rig to drive when it needs some fixin'. Still cheaper than payments/plates/insurance on a newer one.
__________________
Current/past Chevy/GMC trucks:
1958 Chevy C-60; 1965 GMC C-50; 1965 Chevy C-10
1971 Chevy K-10; 1973 Chevy K-20; 1976 GMC C-20
1977 Chevy C-10 Suburban; 1980 Chevy K-10
1989 Chevy K1500; 1991 GMC V1500 Suburban
1976gmc20 is offline   Reply With Quote
Old 04-10-2019, 02:29 PM   #40
Avitech
Registered User
 
Avitech's Avatar
 
Join Date: Mar 2013
Location: Troy, NH
Posts: 44
Re: Daily Driving a Square Suburban

I don't want to daily mine since the commute is 212 miles round trip. But, I just bought it in NC and drove it 800 miles home to NH. It's been sitting behind the barn for 6 years. My boys and I put two days of work into it and drove it home. Everything went smooth and we pulled 13.5 mpg from the 350, SM465, 35 inch MT combo.


__________________
1990 Suburban Silverado
350, SM465 and 35" tires
Avitech is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:30 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com