99 or a 91 Z24

I am thinking about selling my 99 RS and buying a 91 Z24. Do you guys think thats a overall good buy or should i just keep the 99?

while the answer might seem obvious to some, there are a thousand things to consider, tell us a bit more about both vehicles....

8 year older car also, keep that in mind, as jake said, details plz. :)

2 extra cylinders ;)