carb 350/th350 swap to tbi 350 in a 4x4 - Texas 4x4 Forum

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carb 350/th350 swap to tbi 350 in a 4x4

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Old 06-08-2010, 01:13 PM   #1
Join Date: Jan 2003
Location: Lewisville, Tx
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carb 350/th350 swap to tbi 350 in a 4x4

I have a buddy that has an 83 chevy 4x4 with a carb'd 350/th350 he wants to swap in a TBI 350 so I have a few questions.

1. Will the TBI 350 bolt up to the th350 with or without adapters?

2. Any certain year of truck we need to pull the TBI 350 from? I assume it can be a 2wd truck or 4wd truck for the donor?

3. What all has to be hooked up on the TBI's computer once swapped into his truck?

4. Will his radiator work ok with the TBI engine?

5. Any other surprises I should know about? i.e. motor mounts need to move or exhaust wont fit between frame rails?

Thanks for the help.

I had a TBI v6 in my buggy and it seems like there were only 3 or 4 wires hooked up to the computer and it ran fine.

2014 JKUR
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Old 06-08-2010, 04:31 PM   #2
Flex Master
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Location: Blue Texas
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mudskipper4x4 Spottermudskipper4x4 Spottermudskipper4x4 Spotter
Imo the easiest way to do that swap would be to get a donor truck 87-91 that was the same body style an FI from the factory and just pull all the parts that you need for the swap.
Wanted : D60 spring plates, hydro assist ram, dodge road armor rear bumper... Or a money tree
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Old 06-08-2010, 04:37 PM   #3
Rock Monkey
Join Date: May 2010
Location: Springtown TX
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The early TBI is the easiest to hook up, later they added more junk that talks to the ECM

89 YJ TBI 350, 4L60. Thinking Rocks, gonna take a while to build

00 TJ on 35's. My wife took it away as soon as I got it home, now she wants it painted PINK!
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