Go KA-T since you have a low mile car/engine. Find a spare block and build it, swap it when you are ready. Depending where you live, at least in Texas emissions will be exempt for 1991 models starting next year 2016.

Engine has to be same make and newer. If you are in Cali you are jacked.
This equation is always good to remember when dealing with modded cars. You only can have 2 out of 3.
Fast>Cheap>Reliable