86 C10 LS 6.0 6L90E Swap

[kidd79]

Originally Posted by mcnally351

Very cool build. Keep it going!

Thanks bro!

[SC_Titan]

Awesome truck! Quick question. How do you know that Tejas mounts would prevent you having to cut the floor?

Trying to figure out the simplest way to get an ly6/6l90 into my 86 with the least problems.

Can't wait to see it finished!

[kidd79]

Originally Posted by SC_Titan

Awesome truck! Quick question. How do you know that Tejas mounts would prevent you having to cut the floor?

Trying to figure out the simplest way to get an ly6/6l90 into my 86 with the least problems.

Can't wait to see it finished!

I've done quite a bit of talking to the owner over at tejas steelworks about this particular swap, and he assures me that had I used his motor mounts and trans cross member that I wouldn't of had to move the floor. There's a truck out there called Casper that has a 6l90 in it with his mounts, and they didn't have to move it's floor. Give ol Scotty a buzz. He can hook you up with what you need. And he's a cool guy to talk to, with a ton of knowledge to share. Also his electric fan shroud is killer..I used that on my radiator and my temps are right where they need to be even with the air running and the super charger

[SC_Titan]

Great. Thanks for the reply! Was getting the lsa blower setup pretty straight forward. Ready for some vids of your beast.

[kidd79]

Originally Posted by SC_Titan

Great. Thanks for the reply! Was getting the lsa blower setup pretty straight forward. Ready for some vids of your beast.

No problemo. The guys at the shop that's finishing up the swap for me got the blower for it. They had to upgrade the fuel pump, injectors, and coil packs..But I was told it wasn't that big a deal. Also had to get the ctsv wiring harness and computer as the donor truck harness and computer wasn't able to support the addition of the blower

[kidd79]

Some current progress photos on the tailgate

[kidd79]

Outside view

[kidd79]

Finished paint and body work on the damaged front fender, and re skinned tailgate. Never mind the bald dude in the tailgate pic. That's the painter. I think he was still high from the paint fumes. Haha

[kidd79]

Well guys..we're moving at a snail's pace right now. Got some wheels from a friend, and put those on. The truck is over at a different shop now getting the wiring sorted out for the instrument cluster, cruise control, and transmission. Then a few pulls on the dyno to tune it. So far though everything is checking out. Hydro boost brakes work good, and the new power plant likes its new home in the old square. I had to get a new trailer to haul it around on. The old one was not very car hauling friendly. Also found a guy that sells these nifty steering shafts that eliminate the rag joint.

[kidd79]

Look this guy up if you want to delete your rag joint in the 80's model squares. I paid $80 shipped to the house, it was painted and ready to install when I got it. I think he said lead time was about two weeks on getting one assembled and shipped.

[Minuteman99]

I like the way your ride has come together. Nice truck. I have read through your thread, and maybe I just missed it, but what steering column do you have? And how do you have the OD off button and the electric shift button set up? I haven't started a thread yet, but am in the process of swapping an L83/6L80E into my old Jimmy C15.
I appreciate your thread

[kidd79]

Originally Posted by Minuteman99

I like the way your ride has come together. Nice truck. I have read through your thread, and maybe I just missed it, but what steering column do you have? And how do you have the OD off button and the electric shift button set up? I haven't started a thread yet, but am in the process of swapping an L83/6L80E into my old Jimmy C15.
I appreciate your thread

Thanks bro. It's been a long process and there's still more to do. The steering column is original to the 86. There's no OD off button or electric shift buttons. Just put it in drive with the old column shifter and let the trans do the rest is where it's at right now. I've heard of people running paddle shifters with the 6L80 trans

[phillipm]

Did you keep the air box and intake from the Silverado? I'm hoping to find a used one.

[kidd79]

Originally Posted by phillipm

Did you keep the air box and intake from the Silverado? I'm hoping to find a used one.

No sir. Unfortunately I didn't. The donor truck has been parted out from the rest if it's useable parts and dispersed among the masses. Wish I could have helped you out bro

[kidd79]

Update. They got the truck running and somewhat driving.. Ish. The wiring harness would not let the computer talk to the trans computer, and we couldn't communicate/tune the motor computer. So. We all stopped, took a step back and figured we would go to another shop. Took the truck to lethal performance in Knoxville. Those guys rewired the truck with a completely New harness made specifically for this particular setup. Pulled the motor computer and the trans computer, had those sent off to get programmed to communicate with each other. Found out the first computer was for a manual trans and could not be reprogrammed for the 6L90E. Having to get another computer that's more suitable for the setup. Fun fun fun. But hopefully all my trials and tribulations will help someone in the future.

[phillipm]

No worries. Worth a shot!

[kidd79]

Update. Everything is working on the dash board. Both computers talk to each other and now has a working baseline tune in it. Unfortunately we can't go any further. The transmission decided to lose reverse gear, and start slipping in between the forward gears before we could dyno and do the finish tune. Sadly to say, I have spent all of my car funds on this project, and am not able to move forward with this... And if I'm being honest, this project has completely gutted me of my love for square body trucks. I full on hate this stupid truck now and get disgusted every time I see it. Sorry guys..Probably won't be very many more update posts on this particular build. Sorry if i let any of you down.

[MTCK]

Ah bummer sorry to hear this. It's never easy doing something uncommon and I have a hard time staying motivated if I can't occasionally drive a project so I get it. Good luck with the sale.

[daddyjeep]

Originally Posted by kidd79

Update. Everything is working on the dash board. Both computers talk to each other and now has a working baseline tune in it. Unfortunately we can't go any further. The transmission decided to lose reverse gear, and start slipping in between the forward gears before we could dyno and do the finish tune. Sadly to say, I have spent all of my car funds on this project, and am not able to move forward with this... And if I'm being honest, this project has completely gutted me of my love for square body trucks. I full on hate this stupid truck now and get disgusted every time I see it. Sorry guys..Probably won't be very many more update posts on this particular build. Sorry if i let any of you down.

Step back for a bit, maybe some time away will get you back into it. It is going to be awesome when its done. Don't let someone else enjoy all of your hard work until you have at least enjoyed it for a while first.

[kidd79]

Originally Posted by MTCK

Ah bummer sorry to hear this. It's never easy doing something uncommon and I have a hard time staying motivated if I can't occasionally drive a project so I get it. Good luck with the sale.

Thanks bro. The first person to throw 30k at me gets it. I'll even deliver within 600 miles. Lol

[kidd79]

Originally Posted by daddyjeep

Step back for a bit, maybe some time away will get you back into it. It is going to be awesome when its done. Don't let someone else enjoy all of your hard work until you have at least enjoyed it for a while first.

It will be awesome when it's finally done. Though I can't see the light at the end of the tunnel. I wish I had the skills needed to fix it. If I did, it would be done already. I hate having to farm stuff out and wait on others to do it for me. Sigh.

[smpoulin01]

Just read the entire post, don't lose faith!!!!! Take it from all of us that have been in that spot, you will always wish you had kept it! And then a few years from now will start another one. The squares get in your blood and never leave!

[Jake Wade]

Didn't you just have the transmission reworked? Warranty?

[st1]

Stay with it!!! supercharged LS power. sounds good. i totally get what you saying about the build process. I live in NC and my truck is in Nevada, so believe me when I say I get it. Stay with it.

[Puzzled]

Hello all, i have a 86 gmc truck, developed a ac problem blower won't blow except on low low if switched to high position will blow high if you thump the relay, and will blow if you come off high to medium will not blow high again till relay is thump and it dont take big thump just barely touch it and it will blow, have replaced blower motor, relay, resistor, cleaned and relocate ground, in the spring put new ac panel assembly on with switch don't know what else or where to start next anyone any ideas. Thanks