I'm doing an LT1 swap into my '88 T/A 305 TBI auto. I'm researching the wiring aspect of it, and I need to know if the '94 engine and underhood wiring are similar to the '96/7 wiring? I don't have a service manual, and I'd be using SI. But SI only has indepth diagrams starting in '96/7 I think. You GM tech's know what I'm talking about.

 

I belive just the extra wire for the crank position sensor & the fuse box inside the car uses the smaller fuses instead of the traditional ones.

 

Things I can think of that are added on 96-97s:

crank sensor (as mentioned)
rear O2 sensors
EVAP vacuum switch

If you use an OBD-I PCM, leaving these disconnected will never be noticed.