'86 C-30 6.0 LQ-4 Swap question

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01-29-2008, 11:43 PM
CattleAc

'86 C-30 6.0 LQ-4 Swap question

Hello, new guy here starting on my 6.0 LQ4 into 1986 C-30 swap.

Exellent stuff on this site. Before I started, and as my swap progresses, I've used this site for a lot of information.

I would like to ask one question after an extensive search...(forgive me if this is an obvius qustion I just missed by not looking in the right spots)

What factory exhaust manifolds can I use without notching ther frame rails???

Will '98 '99 F-body's work?? How about '00 '01 '02 Corvette???

Thanks, Mike.

Here's a couple pics...

http://i5.photobucket.com/albums/y17...g?t=1201666724

http://i5.photobucket.com/albums/y17...g?t=1201667756
01-30-2008, 08:42 AM
86 Silverado LS1

98 Fbody manifolds on a LS1 in a 86 Silverado here. No troubles.
01-30-2008, 10:25 AM
CattleAc

Quote:

Originally Posted by 86 Silverado LS1

98 Fbody manifolds on a LS1 in a 86 Silverado here. No troubles.

Thanks...this is the info I was looking for.

Read a lot of your posts...good info. Nice pickup also.
02-06-2008, 10:35 AM
team39763

I think the truck manifolds would have fit my 82 if they didn't have the EGR port on them. I started grinding the port down, but then I just gave up and looked into the f-body manifolds.
02-06-2008, 07:35 PM
CattleAc

Quote:

Originally Posted by team39763

I started grinding the port down, but then I just gave up and looked into the f-body manifolds.

What did you do in the end??? Use the F-body stuff???

I bought a set of F-body's a couple days ago...nobody wants used LS manifolds I guess, I got them for almost nothing.

Thanks for the info...all is appreciated.
02-20-2008, 09:10 PM
team39763

Yeah, I ended up using F-body headers.
02-21-2008, 07:55 AM
1BADC10

I mismatched manifolds. One f-body, the other 6.0L truck manifold... only b/c my powertrain sits closer to the radiator by ~4". I had to make a small notch, but not much.
02-21-2008, 08:21 PM
CattleAc

Quote:

Originally Posted by 1BADC10

I mismatched manifolds. One f-body, the other 6.0L truck manifold...

OK...thanks.

I think I'd only have to trim a little to use both 6.0 truck manifolds on that big C-30 frame...both F-body's fit nicely.

My F-body right side fits nicely into the frame...but it gets real close to the bellhousing on the 4L80E.

One more Q...where are you guys getting the flanges that bolt to the F-body manifolds, to weld your head pipes to???

Thanks again, Mike.
03-15-2008, 08:40 PM
team39763

Mike, you probably got this figured out by now. But if you don't, you should check at the wrecking yards. Our yards tell me that they give up the cat converters and the way they get them is to just hack up the y-pipes and pretty much just leave the flanges connected to the manifolds. So maybe you could check and see if ya'lls are the same. Good luck.
03-18-2008, 02:24 PM
CattleAc

Quote:

Originally Posted by team39763

Mike,you should check at the wrecking yards.

Thanks, that is what I did. Found the left side flange.

Right side I found an aftermarket flange for a truck manifold (very thick) that will work with a little die grinder magic. As I said "THICK"...very easy to weld too.

'97-'98 F-body manifolds worked great on the C-30 1-ton swap. Lots of room.

Thanks for all the help everyone...maybe a couple pics of the finished project in a couple weeks.
04-21-2008, 01:22 PM
CattleAc

It lives...started this thing yesterday. So far am extremely leased with this swap.

OK...first off I want to thank everyone who helped with ideas. It made this a lot less painful.

I have one more question though.

I'm sure some of you guys run the factory dual tanks on these models for your swaps.

I have installed 2 EP 381's (1 in each tank), (I used a factory 1987 tank switcher valve) when I fired it up I didn't have enough pressure...about half of what it is supose to have, 32lbs.

I byassed the switcher valve and I have the full 62lbs like I should have.

My questions are...do I have a bad valve???

Or...are you guys using a different way to switch your tanks??

I've searched alot...but haven't ran across anything on this.

Maybe these valves were only made to support the lower pressure TBI system.

My valve came from NAPA PN 22198...
http://partimages2.genpt.com/partimages/94752.jpg

It had a sticker on it that said "Do not exceed 68 PSI" so I figured I should have a small margin of leway with it being that I'm at 62 PSI.

I'd like to here from anyone that's running dual tanks on this one.

Again, thanks in advance, Mike.
04-21-2008, 08:55 PM
HarleyDave

I did the same swap and used the f body too. Wanted to do headers, but wasn't sure. That's on the to do list for upgrades later.
04-21-2008, 08:58 PM
HarleyDave

I didn't go with in tank set up, used a inline that works but I don't like the noise. Please post the final set up? Is the wiring setup from the 86 to the 87 a big deal?
04-22-2008, 02:05 PM
CattleAc

Quote:

Originally Posted by HarleyDave

used a inline that works but I don't like the noise.

I didn't like the noise of the inline on my racecar either...so I went inline.

Quote:

Originally Posted by HarleyDave

Please post the final set up?

Will do.

Quote:

Originally Posted by HarleyDave

Is the wiring setup from the 86 to the 87 a big deal?

Not to bad...I did run heavier gauge wire back to the pumps, as on an 86 all the wires do is switch the tanks. (They dont have to run any pumps).
04-22-2008, 09:43 PM
HarleyDave

So how do you control the pumps is there a relay for the 87? or did you just run a switch?
04-22-2008, 11:28 PM
pcmcobra

FYI,
there are headers out now for the swap.
The LS1 swap headers are done!!!! - The 1947 - Present Chevrolet & GMC Truck Message Board Network
I am picking up the prototypes this weekend to test fit on my 86 6.0 swap..
;)
04-22-2008, 11:56 PM
RedHeartbeat

Wouldn't it be easier to just use the fbody long tube headers? They bolt right in place.
04-23-2008, 12:12 AM
pcmcobra

Well, I guess a lot of things "could" be easier...I like the look of these headers, just giving out some info, a new product not many swappers might have heard about.
04-24-2008, 04:24 PM
CattleAc

Quote:

Originally Posted by HarleyDave

So how do you control the pumps is there a relay for the 87? or did you just run a switch?

I used a combination fuel pump and relay fuse block from an Olds Cutlass Supreme to run my fuel pumps, looks nice...works great.

Quote:

Originally Posted by pcmcobra

FYI,
there are headers out now for the swap.
I am picking up the prototypes this weekend to test fit on my 86 6.0 swap..
;)

I'd really like to see what these look like installed on your '86.
04-24-2008, 05:34 PM
pcmcobra

Quote:

Originally Posted by CattleAc

I used a combination fuel pump and relay fuse block from an Olds Cutlass Supreme to run my fuel pumps, looks nice...works great.

I'd really like to see what these look like installed on your '86.

I'll post pics as soon as I get the motor in and headers on. Having a little trouble "recruiting" help...so it might be a couple weeks...I can't stand it!
04-24-2008, 07:44 PM
HarleyDave

Yes, please post some pic's of the header install. That's on the list to do after the gear change, E-fan, lowering job, paint job, etc... so much to do!!!!
04-26-2008, 05:12 PM
cash talks

please post up after the header swap. i am in process of a 79 4x4 6. swap and ordered factory headers when i started my parts buying spree and did not do my research yet
04-29-2008, 02:23 PM
CattleAc

:doofus:
OK...update...this switcher works just fine...
NAPA part # 22198
http://partimages2.genpt.com/partimages/94752.jpg
I'm an idiot...I had it wired up backwards. When the right pump ran...the switcher was on the left tank feed...I know I'm an idiot.

I thought I would post this for reference sake...just for the guys that do the square body style, with dual tanks. 73-87 C's and K's...or the 88-91 R's and V's.

Thanks again to the whole board...this would have been a lot slower and more painful without all the great info I recieved from here.

P.S. This thing runs like a 4-door dual wheeled Corvette...:D...well, maybe not quite that good but I'm very pleased with it.

Mike.
05-12-2008, 02:02 PM
TurboSteve

Couple of quick questions.

Are you guys using the later 4L60e transmissions?

What motor mounts do you need to use?

Thanks,

Steve
05-12-2008, 02:23 PM
CattleAc

Quote:

Originally Posted by TurboSteve

Couple of quick questions.

Are you guys using the later 4L60e transmissions?

What motor mounts do you need to use?

Thanks,

Steve

I used the 4L80E that came in my donor rig. (2000 2500 6.0L.)

I'm sure a 4L60 would work just fine also...I wanted the 4L80 because this is my main tow rig.

I used Advance Adapters motor mounts Part# 713088-P.

https://eshop.advanceadapters.com/ob...e/713088-P.jpg
05-12-2008, 09:40 PM
littless

i too used the 4L80E that came with the motor 2004 K2500. and the plates from S&P
05-12-2008, 11:11 PM
pcmcobra

Guys,
I tried getting the headers this past weekend, but...
I plan on getting them this weekend, so hopefully I will have some pics for you very soon. Sorry about the wait!
05-18-2008, 08:57 AM
HarleyDave

Do you have a link to the headers?
05-18-2008, 09:13 PM
pcmcobra

Headers

Sorry it took so long.
Passenger side:
http://i114.photobucket.com/albums/n...971640x480.jpg

Pass side: Note clearance :) : Don't mind dipstick...
http://i114.photobucket.com/albums/n...972640x480.jpg

Pass side:
http://i114.photobucket.com/albums/n...973640x480.jpg

Pass side Collector :
http://i114.photobucket.com/albums/n...974640x480.jpg

Pass side not below frame:
http://i114.photobucket.com/albums/n...975640x480.jpg

And the bad, drivers side hits that firewall protrusion, I think they are working on this: I hope so:
http://i114.photobucket.com/albums/n...976640x480.jpg