'85 C10 6.0/4l80 project

Got my old job back. So I'm goin to show some love to my '85. It was my dd through high school and college. Figured I'd pay it back.

I have some questions.........
I assume I can use a baffled tank from a '87, 90-91 guage cluster, walbro fuel pump.
What headers will fit? I have read, read, and read somemore and looks like none will fit.
What do I need to do to make the a/c, cruise, and speedometer and ignition to work?
Where can I get a yoke? and will my drive shaft be too long??
Radiator?
I'm sure i'm missing alot of stuff here

Jeff "gmcwantsls1" probably has all your answers. shcoenfield(sp) for the headers?

Thanks Hopefully he sees the thread and chimes in. I'm aquiring the parts I need then when I get a good check i'll be on the hunt for the motor/tranny

Ttt

On my 86, I swapped a 6.0/4l80e. Used a 91 burb cluster, everything works, need to get my ecm retuned to get the speedo right, just swapped gears...
I went with street and performance headers, pricey, but they fit without a problem and look great.
As far as a/c, depends on how you mount the motor, which plates you use. Mine is set back, and I did not want to notch the frame, so if I wanted a/c I would have to run the hiside kit.
Also, I had a 305/th350, all I had to do was get a crossover ujoint, my driveshaft was correct length. :)
I am using stock radiator, no problems. I did mount a set of z28 electric fans running off my ecm. Working great.
I am also using an 87 tank with 87 sender and walbro intank pump.
On your stock tranny xmember, you will have to modify, I welded a "tongue" on the backside to accomodate the 4l80e mount which is a little longer.
Finally!!! 6.0 POWAH!!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network
check out my thread...

Hey Man, Thanks alot lol. just answered a ton of questions. When you say stock radiator, Do you mean 80's? or 2000's? thanks I'm a member of that site as well with the same user name. Thanks again

1986.
Stock radiator that came from factory in my truck.

On the driveshaft depends on which plates, my stock was to short, plus different yoke for the 80e. Didn't have to mod my crossmenber, in fact just shifted it back to holes already there. The stock radiator worked fine. Running an inline fuel pump but plan to go to the 91 blazer tank to do away with the saddle tanks

Can I ask what motor mounts you guys used? I don't plan on fabricating my own. I want to run a/c so is there anything I should do or not do so I can run a/c?

Quote:

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Originally Posted by pcmcobra

On my 86, I swapped a 6.0/4l80e. Used a 91 burb cluster, everything works, need to get my ecm retuned to get the speedo right, just swapped gears...
I went with street and performance headers, pricey, but they fit without a problem and look great.
As far as a/c, depends on how you mount the motor, which plates you use. Mine is set back, and I did not want to notch the frame, so if I wanted a/c I would have to run the hiside kit.
Also, I had a 305/th350, all I had to do was get a crossover ujoint, my driveshaft was correct length. :)
I am using stock radiator, no problems. I did mount a set of z28 electric fans running off my ecm. Working great.
I am also using an 87 tank with 87 sender and walbro intank pump.
On your stock tranny xmember, you will have to modify, I welded a "tongue" on the backside to accomodate the 4l80e mount which is a little longer.
Finally!!! 6.0 POWAH!!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network
check out my thread...

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I dont want to notch my frame for sure. Does that mean I need to follow your path and set mine back as well? i'm just brain storming.

Both you guys have really nice trucks. I hate the wheels that I chose. I think i'm going with bonspeed but haven't made up my mind yet its a hard decision.
I'm sick and tired of the pos 305, its gutless and always something wrong with it. I'm ready to swap this thing

Do it!!!!

I used carshopinc plates, from ebay...
the standard ones...I think.
There are several guys on this forum, and 67-72 and ls1tech that are running a/c on their squarebody ls swap. I wish I had more info, but I hardly drive mine, so a/c was important to me for my swap. If you run drive by wire it will be a lot easier to run cruise control.(and cheaper)

Hey cobra what drop is on yours?? I got the 5/7 djm drop my truck sits extremely high in the rear. I dont think 7 inches is going to get it where I want it. And the frickin dust covers wont let me put the center caps on. I dont want to run these wheels anyway, just got em for the drop kit.
http://i836.photobucket.com/albums/z...egroup1132.jpg
http://i836.photobucket.com/albums/z...egroup1130.jpg

I think it's a 5/6
3" spindles, 2" springs up front
rear flip kit, no notch....yet

I'm not notching mine, I really don't want to cut up my frame

with a 7" drop in the back i don't think you will have much of choice if you don't want to hit your rear end on the frame each and every little bump you go over. Frame notching is not that big of an issue as long as you do it with the right material and have a competent welder doing the work. There is also the bot in kits from DJM and belltech as well as some others. If you bought the kit then you probably have it already.

As far as the engine swap i am doing the same set up just waiting on a few parts to get things rolling, you should definitely do it!

Yeah I got the 5/7 kit from DJM about 5 years ago just haven't installed it yet. I first had to find a set of bigger then 18 wheels so the calipers wouldn't rub. Plan on installing that as soon as PST gets me my bushings and tie rods.


I'm still looking for the correct motor mounts to run A/C ????????
Anyone know?

give street and performance a call, they could probably answer that quick.

Thank you sir. I can't live in this TEXAS heat without A/C. I'll give them a call real quick and post it up for others.

Hey John I found your build thread here, I'm going to go dbw like Bob did, he's confinced me to do this for my cruise control.
Here's my list of parts i'm working on gathering the next few weeks.
Motor Mounts
'87 tank
'87 sending unit
Walbro pump
S&P Headers

I also ordered Polygraphite bushing kit from PST so I can get it lowered also trying to find another set of leaf springs. I dont know what these leaf springs are on my truck but the rear end sits way higher then normal...
I'm also looking for a 454SS 9.5 rear end!


I gotta get some other motors and trannys outta my way and sold and hopefully they'll come close if not more to paying for my 6.0/4l80.

I'm having a heck of a time finding the same motor mounts you used. I want the same ones you have. seems like you had better luck with the driveshaft and headers fitting right then anyone else....

CAR SHOP LS1GM LS1 LS6 CONVERSION MOTOR MOUNTS ADAPTER PLATES $45.95 BUY ONLINE
I think these are the ones I have....
keep us posted.

Thanks John. I've been looking for a week lol. I couldnt find carshopinc anywhere on ebay.

search for the mounts on here and you should be able to find a pic with the details like the bolt hole spacing and thickness of the plate, 1/4 I believe..

Hey sent me a message with the right ones

Great information

hey lowchevytrucks, did you ever find a mount that would work for the a/c compressor in the stock location? ive been looking at the BRP setup. a bit pricey but the say it will work with the stock location a/c. funny though... the pic they show doesnt have the a/c compressor. tried calling last week but no one answered...

I will find a bracket to mount it up high when the time comes just havent looked for one yet.

I think i'm going to just stick with my '85 tank and run an inline walbro fuel pump

I was curious if I need to run the evap canister or whatever its called? That's attached on the driver side of the core support.

bump

I just got a small breather and attached to the vent line, zip tied it to core support out of sight.

sweet i'll toss this big ugly thang then

Hey can you get me some pics of that, maybe even a part number? thanks

I dont have my truck back yet or I would.

Jeez John whats he doin to that thing? I figured you'd have it back by now