hey i know your leaning towards a swap. but go to datsun1200.com. there is a bunch of info on just upgrading the a14 to go faster. if you built it you could easily get it up to 100hp even with out hcomp pistons ( i think) or you could do a turbo on. one guy has done a blow through turbo on STOCK internals ( i think he mentioned the crank bearings were near 300k.) but he has it reliably running up to 170hp!