can you put a 92 pontiac engine 5.7 & trans in a 1983 grand prix.

1992 trans am motor&tranny

It should work but you may have to fab a transmission mount. Also, if the 5.7 is fuel injected you will need the computer and wiring harness to make it work. It may also require a change in the tail shaft on the trans or a different drive shaft.

i also have an 86 borg warner rear end(out of an Iroc-Z) and was wondering if it would bolt up to the rear.

It may be too narrow for the Grand Prix chassis. If you intend to remove the trunk and put in larger wheel wells for slicks or much larger tires then the rear should work in the car but it will take a lot of fabrication. Measure the two rear ends before doing anything. This will give you a good indication of what you will be up against.

thank you gtpdad.