4.3 engine swap

I am maybe looking a resurrecting a 1995 S10 SS siting in my driveway i was going to use for parts. Its got a bad 4.3 in it. Seems to be quite a variety of 4.3 out there. What years will swap
in this truck without re inventing the wheel? I did find this information:
Can you use a TBI motor in it with maybe a manifold swap? Maybe a camero or astro or such motor? Seems to be a lot of locations for the knock sensors on different years. Where is the control module for the fuel injection on a 95? it does not have the computer module on the overflow tank like my 96 does.
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