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has anyone done ane engine swap on a 98 or newer s10, form the 2.2 to a 4.3, what i need to know is what will compatible with the 4.3. i know i can get a painless wiring harness for an engine up to 95 but besides the tranny what will i have to replace. i'm just trying to decide if the cost is worth it.
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Radiator (possibly), motors mounts. You probably have 3.73 gears out back which will do quite nicely off the line for the 4.3.

However, with the cost involved, you might want to look into a mild 350 or an LT1. Just a thought.

The wiring harness that you can get I believe is the TBI, possibly might be obd-i, but i doubt, and def not obd-ii.

The TBI motors have about 30 less hp than their brethen - but personally i find TBI more rewarding.
 
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