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Old August 26th, 2009, 12:52 AM   #1
teichman
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Default 4.3 tbi to 5.7 tbi

i have a 89 s-10 blazer and i'm going to put a 350 tbi my question is will the tbi setup in the bazer work for the 350 tbi. what will i have to change
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Old August 26th, 2009, 06:55 AM   #2
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I've known a few people that swapped engines and never changed anything and all was well. As long as the years between the two are close to the same, it should be plug and play. Depending on the year, the TPS sensor will either be a flat 3 wire or round 3 wire.
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Old August 26th, 2009, 07:17 AM   #3
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The wire harness is the same, you will need the computer from the 350 and if this is going in a 4x4 I do believe you need an oil pan made just for this swap.
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Old August 26th, 2009, 12:42 PM   #4
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are you swapping from a 4.3 to a 350? or are you asking if you can take the TBI unit from a 350 and put it on the 4.3?

if your swapping engines you will need to change the computers. or you can have your computer programmed to run the 350. it will run off the 4.3 computer but not very well. if it's 4x4 you will need the special oil pan, motor mounts and you'll have to run either custom headers or camaro manifolds.
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Old August 26th, 2009, 03:46 PM   #5
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the blazer body is going on a k5 frame
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