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4.3 vortec throttle body to ls1

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Old 09-02-2011, 12:15 AM
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Default 4.3 vortec throttle body to ls1

hi guys, im not to familier with the whole ls1 conversion game. i have a 1995 chevy c2500 with a 4.3 vortech and a 5 speed. the 4.3 is a throttle body motor and it just dont have the power i want to pull my race truck around. was wondering if it was possible or how hard it would be to put a ls1 in this truck. would i need to switch wiring harnesses or would it be a simple hook up. i dought it would be simple. just trying to decide on ls1 or just a 350 vortec, id much rather put the ls1 in it because im really impressed by the ls1. HELP ME OUT
Old 09-02-2011, 12:22 AM
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You sure it's a 2500? Not a big deal..just wondering on that part.

It wouldnt be hard to do at all..what kind of Trans is in it already?
Old 09-02-2011, 08:40 PM
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yeah, its a 2500, its a funky one of a kind truck, v6, 4.3 vortec, 5 speed tranny (thats all i know on the tranny) 2wd, 6 lug, red with Sporttruck written down the side of it, shes a one of a kind lol
Old 09-02-2011, 09:39 PM
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All 2500's are 8-lug..sounds like someone switched some Badges..prob a Getrag or a T5 Trans.
Old 09-03-2011, 02:16 PM
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Towin with it i'd ditch the 5speed and get a 5.3 or 6.0 vortec/4L60 combo. 5.3s are cheap. If you use mostly junkyard parts and leave it all stock, you can do it for around $1500. But thats doing it all yourself including wiring. Its not a weekend job. Vortec 350 could be in and running in a weekend.
Old 09-04-2011, 09:34 AM
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You need to read the swap thread on ls1truck.com
Old 09-05-2011, 05:39 PM
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ok, thanks guys, and the merv, its called a "light duty 3/4 ton truck" it is a 3/4 ton and it is a 6 lug, im 100% sure, if you want to find out yourself go to advance and look up a 95 chevy c2500 4.3 and look at a drum for the rear, one is a 6 lug and one is a 8 lug
Old 09-05-2011, 07:04 PM
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That's alot of truck for a 4.3 V6..lol.
Old 09-05-2011, 11:44 PM
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yeah i know, you can really tell going up hill lol, shes tired too, 202k miles of lots of hard runnning



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