The motor swap may be due to the car having a blown motor to start with. If this is the case then a rebuilt or used TT Z motor will cost a pretty penny but will still be cheaper than a JDM SR or RB.
Having the 2 cars to choose from (89-S13 or 95-Z)I would go with the Z. As long as you understand that the TT's require a good owner and some level of service.
Do some research on both cars and make a good decision.Good Luck and let us know what you end up getting.
