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88-98 fullsize chevy truck LS1swappers....please step inside

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Old 08-07-2003, 09:24 PM   #1
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Default 88-98 fullsize chevy truck LS1swappers....please step inside

I'm new to this board. I have a '93 fullsize Chevy truck that I'm thinking of swapping in an LS1. For those of you who have done this conversion or are in the process of doing it, could you point me in the right direction regarding this swap.
You guys are the experts and I'm here to learn what I need to do to accomplish this conversion.
Thanks for the help, SC.
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Old 08-07-2003, 10:29 PM   #2
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Default Re: 88-98 fullsize chevy truck LS1swappers....please step inside

Also check out www.ls1truck.com Allen and the guys over there will be able to answer all your questions.
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Old 08-09-2003, 12:29 PM   #3
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Default Re: 88-98 fullsize chevy truck LS1swappers....please step inside

Am attempting this swap right now. I'm installing a 2001 LS1/4L60E out of a Camaro SS, into a lowered 1996 GMC Fleetside. If I can help answer any questions, just ask away. Thanks, Ed
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Old 08-12-2003, 03:57 PM   #4
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Default Re: 88-98 fullsize chevy truck LS1swappers....please step inside

Hi, Ed, thanks for the response.
I've built a number of cars/trucks over the years, but I'm new to LS1's, so I'm in the learning stage right now about the swap. I've been reading everything I can about LS1's.
I'd like to go ahead and get my LS1/4L60E combo. Will the f-body oilpans clear the crossmember in our trucks, or do I need to go with the truck pan. What about a/c compressor or alternator clearance on the frame rails - I looked at a 2002 LS1 truck engine yesterday, and the a/c compressor was mounted very low on the passenger's side.
What are you doing for harness mods?
I contacted Street & Performance (I've dealt with them in the past) about a stand alone LS1 harness and they want $900 (ouch) for the harness and another $250 to reprogram the PCM. Think I'll be modifying the factory harness.
If you'd like, you can email me directly at carpediem_00@yahoo.com
Thanks, Casey
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Old 08-12-2003, 08:16 PM   #5
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Default Re: 88-98 fullsize chevy truck LS1swappers....please step inside

Hey Casey...Yes, the Camaro(F-Body) oil pan does fit. The stock Camaro exhaust maifolds also will fit. The drivers side has lots of clearance and exits in a good location. The passenger side manifold is very close to the top of the upper control arm hinge point at the rear of the manifold, but with very minor trimming, it will also work & exits o.k. At this installed height, it looks and fits simular to the engine height that was removed. I just ordered from Street & Performance, a set of their LS1 "G-Body" thermocoated headers($495.00) that I hope will allow me to lower the engine another inch, but will see. I also ordered their "passenger side high" A/C compressor bracketry/pulley arrangement($350.00) and their "Sanden 508" compressor($209.00). I did not have this stuff in my budget to buy...But I talked myself into it, in the name of saving time. I swapped all the Camaro accessories(including the dampner/pulley) on the drivers side, over to the Corvette accessories, which brought everything up higher for clearance. I hope to send out my harness for modification to save $$, or I might use it "as-is" and add a simple VATS by-pass module. The computer has to be re-programmed. I narrowed that down to about 10 different places that can do it(???).Most seem to be in the $250.00-$350.00 range. The cross-members on the 99 and newer trucks provide clearance for any of the newer Vortec/LS1 air compressors in the factory location on the motors. Hope that is enough to get you thinking! Thanks, Ed
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Old 08-12-2003, 11:58 PM   #6
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Default Re: 88-98 fullsize chevy truck LS1swappers....please step inside

just to let you know most Gm shops will flash the PCM for about $100 and then you could get LS1 edit to delete whatever you don't want like vats or what not. And if you guys come across any ifo about putting an engine and trans into a 4X4 send me the info
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Old 08-13-2003, 12:10 AM   #7
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Default Re: 88-98 fullsize chevy truck LS1swappers....please step inside

Get a harness from one of our sponsors, Speartech!
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Old 02-10-2015, 08:29 PM   #8
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I'm looking at doing the same on my 88 Chevy k1500 four wheal drivebut with an lq4 what motor mounts are you using to keep in the same location so I can still hook up my original drive lines an do I need anything to hook up my stock Gages? I'm gonna stay with my th400
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Old 02-11-2015, 03:22 PM   #9
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For headers you can do the Schoenfeld long tubes that are designed for this swap.

The harness you could get from Speartech, PCM for less, nelson performance.

I used transdapt adapter plates on mine but you could use dirty dingo or any number of mounts

For the A/C you can either notch the frame for the LS ac compressor or get a high mount A/C mount for your factory compressor from dirty dingo or lsbrackets.com
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Old 02-11-2015, 05:02 PM   #10
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Quote:
Originally Posted by thunderwagen View Post
For headers you can do the Schoenfeld long tubes that are designed for this swap.

The harness you could get from Speartech, PCM for less, nelson performance.

I used transdapt adapter plates on mine but you could use dirty dingo or any number of mounts

For the A/C you can either notch the frame for the LS ac compressor or get a high mount A/C mount for your factory compressor from dirty dingo or lsbrackets.com
What brackets tho the inch back or do I keep it in the same spot????
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Old 02-11-2015, 09:23 PM   #11
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Inch back. Dirty dingo makes a nice set
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Old 02-12-2015, 12:01 AM   #12
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Alright sweet!!! Them headers you recommended are for a 2 Wheel Drive do you know any 4x4 headers that would work? An what would be better for this swap long tube or shortys??
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Old 02-12-2015, 12:12 AM   #13
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Buy the dirty dingo mounts, the adapter plates suck ***. A truck pan works, it hangs alittle lower than the crossmember but i've never had a problem.
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Old 02-12-2015, 01:57 AM   #14
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Am I gonna need anything to keep my stock gauges???
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Old 02-12-2015, 06:56 AM   #15
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The muscle car pan works great in most trucks ,, and allows you to lower the truck also ... Its the least expensive option if you plan on lowering your truck
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Old 02-12-2015, 10:28 AM   #16
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The dirty dingo mounts work with your stock frame mounts if you already have a V8. They are adjustable so you can put the motor where the old one was. I measured where the brackets were on my 383 and put them in that location on the ls motor. I measured from the back of each motor. You can get your stock gauges to work. I used a 1998 Camaro temp sensor which is a 3 wire sensor. 2 wires go to the pcm and one to your temp gauge. Some say it reads a little off but on my 1992 it reads perfect. White wire from distributor is your tach wire. You will need to tune pcm to get correct reading. Oil pressure gauge use the trucks oil pressure sender you will need an adapter to thread into ls block. As someone else said Ls1truck.com has a ton of info on this swap.
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Old 02-12-2015, 05:44 PM   #17
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Can I keep the regular TBI fuel pump or is there another in tank fuel pump I have to get?
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Old 02-12-2015, 10:24 PM   #18
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You'll need a later 97 up vortec pump or any of the good aftermarket ones like aeromotive, walbro ect. 340lph should be plenty for a non forced induction engine.
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Old 02-12-2015, 10:41 PM   #19
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If you don't plan on making huge power you can use a walbro 255lph with a corvette fuel filter/regulator.
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Old 02-13-2015, 07:24 AM   #20
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true. It depends on what engine you go with. if you get a truck engine with the return style fuel rails then you won't have to run the vette filter.
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