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Old 01-25-2019, 10:57 AM   #1
lukeembry
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85 C10 LT/6L80 Frame off build

I decided to swap my truck from LS/4L85 to an LT/6L80 back in October of 2018, it didn't take long for it to spiral out of control. I thought I would share my build as I work on it. Hoping to have it complete by July 2019
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Old 01-25-2019, 07:36 PM   #2
SCOTI
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Re: 85 C10 LT/6L80 Frame off build

Interesting. Most guys would be just fine w/the LS/4L85 combo especially one that looked as nice as what was under your hood.
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Cubic inches is like Indiana Jones with a cheap pistol....
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Old 01-25-2019, 08:49 PM   #3
Chris74
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Re: 85 C10 LT/6L80 Frame off build

That truck is so clean
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Old 01-25-2019, 09:43 PM   #4
lukeembry
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Iím just bored with the LS. Want a 6 speed and wanted to update the truck. Engine and trans went to good use in a friends C10

QUOTE=SCOTI;8450988]Interesting. Most guys would be just fine w/the LS/4L85 combo especially one that looked as nice as what was under your hood.[/QUOTE]
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Old 01-27-2019, 10:18 PM   #5
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Re: 85 C10 LT/6L80 Frame off build

Sheetmetal work happening now, due to some repairs 15 years ago I'm going to change out the doors and doghouse for some nice original paint doors, fenders, and hood. box of hardware going out for zinc plating. hoping to be doing body work in the next week
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Old 01-30-2019, 04:24 PM   #6
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Re: 85 C10 LT/6L80 Frame off build

Glad to see someone else doing an LT build. But I am curious as to why you chose the 6spd auto over the 8spd or a manual for that matter. Keeping it a column shift or doing a floor shift?
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Old 01-30-2019, 04:30 PM   #7
lukeembry
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Re: 85 C10 LT/6L80 Frame off build

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Glad to see someone else doing an LT build. But I am curious as to why you chose the 6spd auto over the 8spd or a manual for that matter. Keeping it a column shift or doing a floor shift?

Why not a 6L80? it will be much better than the 4L85E that I had. Also I'm not sold on the 8L yet, most I have driven make a lot of noise clunking around. A T56 magnum would have been nice but the cost really adds up to do that. I will keep it column shift with the OE shifter rod assembly
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Old 01-30-2019, 06:46 PM   #8
Mattchu60
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Re: 85 C10 LT/6L80 Frame off build

I really dig that truck - super clean. I like the stance and wheel tire combo as well.
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Old 02-01-2019, 08:08 PM   #9
GMC Guy
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Re: 85 C10 LT/6L80 Frame off build

Love the setup(s) and the truck is clean as hell. excellent work. I found a 6.2 and 2wd 6l80e, with harness, accessories, and driveshaft, out of a 2012 silverado with 116k miles for 5 grand. Been thinking all day about changing out my cammed L33 and 4l65.
I read some people saying the 6l80 isn't as strong as a 4l80 and can't hold much more than 400hp. Any concerns with yours? or are you staying relatively mild with the LT?
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Old 02-01-2019, 10:36 PM   #10
lukeembry
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Re: 85 C10 LT/6L80 Frame off build

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Love the setup(s) and the truck is clean as hell. excellent work. I found a 6.2 and 2wd 6l80e, with harness, accessories, and driveshaft, out of a 2012 silverado with 116k miles for 5 grand. Been thinking all day about changing out my cammed L33 and 4l65.
I read some people saying the 6l80 isn't as strong as a 4l80 and can't hold much more than 400hp. Any concerns with yours? or are you staying relatively mild with the LT?
a 6l80 will handle much more than 400hp 6l80 is super sensitive to the tune so once someone goes to tuning on them they go to crap. there are lots of people making north of 500rwhp with them. no issues for me, mine will be 420 or so hp so it will last forever
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Old 03-07-2019, 11:06 AM   #11
lukeembry
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Re: 85 C10 LT/6L80 Frame off build

anyone have a 81-87 damage free OE hood near bowling green KY?
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Old 04-11-2019, 07:41 AM   #12
lukeembry
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Re: 85 C10 LT/6L80 Frame off build

new Sheetmetal fitted and ready for some small repair work, sending all the hardware off for clear zinc coating
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Old 04-12-2019, 08:13 AM   #13
lukeembry
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Re: 85 C10 LT/6L80 Frame off build

Rear-end build time, for years I've been using Richmond gears with no issues. I like how they have the pinion depth on the pinion head, makes set up much easier. I will also be using their Richmond Excel axles and set-up kit to freshen up the 30 year old 12-bolt.


Richmond 3.42 gears 49-0070-1

Richmond set up kit 83-1018-1

Richmond Excel axles 92-25192
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Old 04-12-2019, 09:36 AM   #14
SCOTI
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Re: 85 C10 LT/6L80 Frame off build

Nice parts.
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All Fleetsides

Building a small, high rpm engine
with the perfect bore, stroke and rod ratio is very impressive...
like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.

Cubic inches is like Indiana Jones with a cheap pistol....
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Old 04-12-2019, 09:53 AM   #15
Mattchu60
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Re: 85 C10 LT/6L80 Frame off build

I am curious- what is the reason for all the body rebuilding - in the pictures the truck looks really sharp already. The Paint appears to be nice as well!
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Old 04-12-2019, 10:49 AM   #16
lukeembry
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Re: 85 C10 LT/6L80 Frame off build

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Originally Posted by Mattchu60 View Post
I am curious- what is the reason for all the body rebuilding - in the pictures the truck looks really sharp already. The Paint appears to be nice as well!
Thanks for asking Matt, I built the truck and did the body/paint work back in 2002. The truck still looked really good but there were several issues I wanted to fix and it just made sense to start over with some nice OE paint sheetmetal and pass the old panels on to someone else that could use them.
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Old 04-12-2019, 10:49 AM   #17
lukeembry
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Re: 85 C10 LT/6L80 Frame off build

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Nice parts.
Thanks keep in touch more to come!
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Old 04-15-2019, 09:31 AM   #18
lukeembry
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Re: 85 C10 LT/6L80 Frame off build

Primer #2 is complete, using all Tamco products on this build. if you are a body man and haven't used Tamco primer you are missing out!
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Old 04-15-2019, 11:02 PM   #19
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Re: 85 C10 LT/6L80 Frame off build

what primer from tamco did you use? im gonna spray some 5311 this week, first time using their products
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Old 04-16-2019, 07:39 AM   #20
lukeembry
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Re: 85 C10 LT/6L80 Frame off build

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what primer from tamco did you use? im gonna spray some 5311 this week, first time using their products
5310, best primer I have used so far. I have sprayed PPG, Dupont, Spies, for years and like this better
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