The block is the same. Oil pan, manifolds, fuel system are all different.
The blocks are the same, but the manifolds are different.
Yes. Check your local smog laws, though.
Yes. You will need to change the motor mounts and do some exhaust work and install a bigger radiator. But a direct bolt in NO.
NO. That would be the TBI / throttle body injection engine Not a vortec. The vortec will not work in the 91.
Yes
yes they both will match up
Basically AC motors would not work on DC supply but there's however an exception for a Universal motor also known as a series motor. This is the only motor as far as I know that work on both AC and DC.
Externally they are both the same. The 389 motor mounts should work just fine.
yes the bell housing should bolt right up. its basically the same transmission for both vehicles, but you might check and see if the tail pieces match up. but other than that its basically the same motor and transmission for both. the z28 should have a 305 if so it would certainly bolt up. overall yes it will work. i just put a motor from a 91 sierra in an 85 camaro z28 and had no issues.
you need to check the switches first. if not that, it is the power window motor .
The windshield wipers have their own dedicated fuse. The fuse can be found in the fuse box. The location of the fuse is listed on the inside cover of the fuse box.
No