[Tom O]

I have a dead 4.3 v6 (code x 1996) with sequential electronic fuel injection and have to replace it with another engine, can I just use my sequential system on the new engine?(any year) Or do I have to use a 96 to date motor because of sensors? Would a 96 to date engine work properly with the OBD II system and the 96 computer if not what years will?
How about bolt patterns for head/intake manifolds.

thanks for any imput.
Tom O