I can't really think of any differences between the two, other than air inlet routing and exhaust which is needed to fit the engine in two different cars. The longblock is the same, same 58 tooth reluctor, etc.
No reason why you can't use the factory computer (GTO or Vette, they're likely the same), use a custom harness if you want to clean up all the snipped wires you aren't using, and a tuning program like HP Tuners or EFI Live.
Jody
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