Cab and Chassis with Fleetside bed
 

Hello this is my first thread/post so forgive me if this is in the wrong section.


I recently traded my 1986 K20 for an 83 K30 135.5 wb Cab and chassis. Previous owner put a beatup 8ft fleetside bed on it.

https://imgur.com/a/y0z3n

https://imgur.com/a/ATGmI

The wheels under the bed are not centered due to the previous owner sliding the bed forward to eliminate the infamous 4 inch bed gap between bed and cab.

I would like to see pictures of any regular cab C&C that has had an 8ft bed converted onto it. I can only find about 5 or so pictures on google about this.....I'm torn on making this fleet side conversion a bit better or just getting rid of it and installing a dump flatbed.

and yes the lightbar is going. and more than likely the bumper as well

Re: Cab and Chassis with Fleetside bed
 

That bed has rust? Looks like it. cut that bed 6" from the front of the header panel, and source a rust free bed to make the full bed you need.

Some others will also say to cut the frame the 4"

Re: Cab and Chassis with Fleetside bed
 

Yes unfortunately each bedside has numerous holes all along the bed. I will take more pictures tomorrow of the bedsides. It actually doesn't look too bad considering the lower quarter of the bed on each side is rotted gone completely for a few inches so the axle almost centers itself due to the rotted bed !


That's not a bad idea though- extending the bed itself by grafting on an extra portion of it.


I do have a rust free 8 ft bed I was considering throwing on it since the rest of the truck is so clean for a Connecticut truck. But I'm weary of how bad the gap would look since I would only want to put it on if I was centering it with the axle...and with centering would leave the 4 inch gap.


The po welded part of the bed to the frame sadly. I may just cut the brackets off and slide it back myself to see for sure in person.

Re: Cab and Chassis with Fleetside bed
 

A company called Lund used to sell a product called "Lund Wideside Fender Flare" made just for trucks with dual rear wheels w/ a bed on them. Not near as wide as a dually fender I have seen them & they look good. They were about 4" wide.
I don't know if they still make them or not.

Re: Cab and Chassis with Fleetside bed
 

Fender flares wouldn't look to bad in the rear. I also haven't even think about legality of the duals under the bed here in CT till just now. I believe the outer duals do stick out slightly from the bed. We have pretty relaxed motor vehicle laws here so I'm not sure.



One thing for sure is I'm definitly not cutting the frame. I thought about even making this truck a SRW by throwing on some single wheel hubs up front and running a 2 inch spacer in the rear if I didn't want to change the hubs/backing plate. Since the 14 bolt dually is narrower. From what I've read they run the same housing as the single wheel version just have to change the hubs and bring the backing plates out a few inches. but that's only a dream/idea. Makes more practical sense to just leave a dually


Too many possibilitys

Re: Cab and Chassis with Fleetside bed
 

shortening the frame would be tremendously easier than extending the bed...
or just go with a nice cm style truck bed

Re: Cab and Chassis with Fleetside bed
 

my friend has a c&c with the box centered on the rear wheels . . . looks just fine to the un-trained eye that dosnt know the gap spacing .

i will have to dig up a pic or 2 for you tonight.

Re: Cab and Chassis with Fleetside bed
 

that would be great thanks!


If the bed gap isnt that bad I might just run it with a gap. The offcenter wheels are just messing me up!


Another thought I had was to use the current already attached bed but attach dually fenders. Keep the bed in the correct gap (still close to the back wheels like it currently is,and off centered) and then slide the dually fenders back 4 inches on the bed to make the wheels centered. On a regular dually bed this wouldn't be possible I believe because the inner bed behind the dually fenders is already trimmed. ....Id still have a narrow dually rearend but this would correct the bed gap and axle centering at the same time.

Re: Cab and Chassis with Fleetside bed
 

these will move the wheelbase two inches forward with just a spring perch change.
I would just move the spring hangers though if it were me.

https://www.ruffstuffspecialties.com/catalog/2PLUS.html

Re: Cab and Chassis with Fleetside bed
 

Wow that looks like the best idea yet. 2-3 inches would definitly make it much better. I think i've heard of these before.. any idea how safe these are? I imagine being welded in and all theyd be okay I just question towing and heavy loads with them. It's like what I've heard with shackle flips. They are bad for towing. (only what I've heard though, no real world experience with it)



moving Spring hangers is probably the cheapest and easiest method. It could be done. The truck has enough springs to not really need to be centered in the frame hump (not worried about axle hitting frame) I just hate to cut factory rivets. You could practically eat off this frame in some spots. Then again this truck isn't in mint original condition either. Supposedly was a fire truck. At some point someone replaced the 350 with a 400 sb with a mild cam in it


so far obijuan's suggest of the perches or the other idea of sliding spring hangers are probably best bet.





Still looking to see if anyone has pictures of any C&C they've put an 8ft on.

thanks everyone for your input so far

Re: Cab and Chassis with Fleetside bed
 

Those spring plates are way overbuilt. I guess they are as good as your welds. I have installed them on a few trucks without issues. Just make sure you have a torque wrench and locktite.

Re: Cab and Chassis with Fleetside bed
 

14bolts have 3.25" axle tubes right? That kit descript said it's for 3" tubes.

Re: Cab and Chassis with Fleetside bed
 

3-3/8. Grind it out to fit.

Re: Cab and Chassis with Fleetside bed
 

here is the most current pic with box set with the extra gap and axle a bit off . the rear is on 2600lb per pack leafs for a light 3/4 ton suburban and a 4" flip kit in the rear . tad high we just have to dial it in yet . trucks on 37" tires.

Re: Cab and Chassis with Fleetside bed
 

SweetK30, that looks great! You're positive that's a 135.5 in wheelbase? aka dump truck frame. It definitly looks like a C&C frame (no bend in the middle) That shackle flip really pushes it forward nice and center!

Problem with if I slide the whole axle /hangers forward 4 inches is, After I get done drilling all the holes and buying all the expensive grade 8 hardware I may as well have just done the shackle flip due to the cost and work invovled.


I'll update this thread with pics when I've finally done one of the ideas suggested here.




1. Shackle flip
2. Slide Axle/springs/hanger forward a couple inches
3. Leave everything, throw a dump flat bed on it

Re: Cab and Chassis with Fleetside bed
 

my buddy owns the truck and i built a lot of it . its a c&c frame !

had a dump bed on it . and measured out at 135"

i have 4 k30 trucks my self so i know them just a little bit . :metal:

he wants a bed swapped out for a military trailer bed . then we will drop the rear just a bit to get her butt down a hair . thats a 4" flip kit . prob swap to a 2.5" flip and be super happy then .

Re: Cab and Chassis with Fleetside bed
 

that's excellent, thank you!


Yeah I also own a 1987 K30 SRW I plan to restore when it gets a littttle bit warmer out here. Watch out for the build thread on that one!



This info is great. Great forum. Haven't paid attention to shackle flips really until now. I'm thinking I'll go with the 2inch from ORD to fix the wheel base a bit. Maybe eventually slide springs up but for now ORD will work. This truck is going to be a daily soon, just have to register it and do a few other things. I want to convert it to SRW but I don't want to completely disable having a rear dually right now, so I think I'll run a 1 or 2 inch spacer in the back to make up for the shorter wheel width.

Re: Cab and Chassis with Fleetside bed
 

srw hubs up front = simple swap over . just finding them used for a fair price = pita .

rear c&c = 3" spacer per side and bam your width is corrected . i have been running a set for close to 10 years no problems with TON'S of weight and plowing and offroad trips .

here is the axle with spacers and last pic under the new build up k30 truck .

Re: Cab and Chassis with Fleetside bed
 

Well sweetk30 you've answered every question I had pretty much about this whole conversion. I too will be using the truck for plowing (going to mount a fisher minute mount I've had stashed away for this truck) and would like to haul things in the bed and tow a craigslist vehicle here and there.

You've pretty much done the swap then. It's really assuring to me to know you've done exactly what I'll be doing with this truck for not just a little while, but heck 10 years is more than enough for trial. I've always heard horror storys with wheel spacers but I think it'll be okay.


Any idea where to go for spacers or any recommendations? I know spacers depend on lug centric, hub centric etc type wheels. I plan to just run stock 16 in steelies.


There's 2 machinists I know of here that do Dana 60 single wheel conversions. I think I'm going to give one a ring as soon as I register the truck. One of them is literally the next town over, if i'm not mistaken said he fabricates some stuff for ORD when I met him. I have heard though that the machined dually hubs arn't the greatest. I wouldn't know. Seems to me it wouldn't be a big deal



thanks again.




edit: and nice truck! I've seen your thread on that one. C10 body on K30 right? Always thought about doing that. There's plenty of clean c10's not enough K30's....and most of the c10s were highly optioned whereas the K30's were base models usually...



edit:2 I my as well include a walkaround of the truck for anyone interested.

https://www.youtube.com/watch?v=W1V9P-4BtUI

Re: Cab and Chassis with Fleetside bed
 

true srw hubs have full face for wheel to seat up to . drw hubs have 8 bolt hole tabs for the bolts to hold rotor only . i would rock it this way on a trail only rig my self . but not a street truck .

swapping hub/rotors is just as easy as servicing the wheel bearings . no other parts needed in the swap .

those were ebay spacers . 1 dab of red loctight on each stud and 10 extra foot pounds on the lug nut torque was all i did and they never moved .

have had 4-5 different sets of steel or aluminum wheels on them no problems.

hub centric is best but these spacers were not that . and still no problems.

and you have the rareish fisher mm truck side for square body trucks ? ? always wanted a set just incase i found a smoking deal on a plow setup . but love my SUPER beefy old school mounts . and once the plow is on the truck it stays for the season . no on/off for me .

Re: Cab and Chassis with Fleetside bed
 

Okay. I'll definitly keep an eye out for single wheel hubs......... I know theyre tough to find ...

I kick myself all the time for passing up a SRW 1985 K30 Automatic minus 454 motor for $500 this past fall....kid younger than me offered to sell it to me and I didn't want another truck in my yard LOL.... Oh well you live with your regrets and bad decisions...wouldn't be the worst decision I've made and come to regret though ha. Truck was really optioned too. I ended up conving my buddy to buy it so he can use as a donor for a C30 Crew he's going to convert soon.



and yes sir. I bought an 85 K20 in Cromwell CT for $750 last registered mid-04/05 to a Farm. The undercarriage was cleaner than almost any New england square except for 1 spot on each side of the frame by rear hangers that had got cancer. The paint was really nice too except for all the giant paint bubbles that remind me of 16 year old acne when they bursted with my power washer. It's borderline savable. Such an awesomely optioned truck and thing ran and drove after 2 hours of tinkering (bad fuel pump, trans line)

Must've been a lot truck or sat I really don't know a whole lot about it except there's a rusty jones sticker in the rear window as well as a West Marine sticker..... Even had original owners manual with name and info. Build sticker etc.

first pic is upside down, but you see that little jewl there attached under that nice shiny bumper? Fisher minute mount plow frame! ! ! I just so happen to still have the plow side minute mount off my old 96 F350 that was fully motor pulley driven. If you think about it, it's basically a Speedcast set up that detaches I guess. I love the old speedcast but I'll take this any day of the week.

Re: Cab and Chassis with Fleetside bed
 

EZ Accessory

They have 8-lug options. For 3" wide, you need the larger 9/16 studs....
http://www.ezaccessory.com/Wheel_Ada...8650-8650d.htm