200SX is the car of choice for cheap power kicks, looking at them myself. If you can find one old enough you can stick it on a classic policy with limited mileage. So you'd be looking at pre 1996.
Yep paul, good bang for buck, that would be a S13
CA18 DET is such a good engine too (its really a RB26 with 2 less cylinders )
Still got alot of options tbh