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Old 11-08-2019, 01:48 PM   #1
Klassen kustoms
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Join Date: Jan 2019
Location: Williams lake bc
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Advice on lt1 swap in a 91 2wd S10 jimmy

Needing some experienced advice from some people who have done the swap! I know my way around a v8 S10 so thatís not the issue but Iím a little stumped on how to wire the lt1? Iíve never really messed around with one that wasnít in the chassis it came with and I want to do something with fuel injection for the jimmy!

Iím just kinda wondering how was the wire harness wiring ? Lots of it or was it fairly straight forward ? Or is their pre made harnesses ( google didnít come up with much )

Iíll probably be doing an lt1/700r4 setup and the trucks currently a tbi 2.8 if that makes a difference in wiring vs the 4.3

Thank you in advance! Any tips about pretty much anything on the swap will be appreciated
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Old 11-08-2019, 09:32 PM   #2
Ziegelsteinfaust
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Location: Chino Hills
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Re: Advice on lt1 swap in a 91 2wd S10 jimmy

They have a couple swap harnesses. I only mildly looked into that when I dropped a LT1 into my 69 Camaro, but I did carb swap for my personal ease.

A couple of pointers. If you use a Corvette, Camaro, or Caprice version. Use the radiator from that vehicle. All 3 have different water pumps, and differences in the radiator due to the way the hoses are utilized.

I used the Camaro style since it looked more like the classic style of my factory heater routing.
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Old 11-08-2019, 09:34 PM   #3
Klassen kustoms
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Re: Advice on lt1 swap in a 91 2wd S10 jimmy

I was not aware of that they were different like that thank you.. Iíll look a bit harder into the swap harnesses I mightíve missed something I was hanging out with a couple friends while scrolling so I mightíve missed something while talking
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Old 11-09-2019, 09:53 PM   #4
Ziegelsteinfaust
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Re: Advice on lt1 swap in a 91 2wd S10 jimmy

https://www.painlessperformance.com/wc/60502

Lastly it is a good idea to run the steam bypass off the back of the block. Sometimes the air pockets can be trapped there.
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