assuming both n/a and turbo cars are stock, start with a turbo car. not trying to bash but i see the few n/a drivers that plan on doing a turbo swap. and reality is, it cost more to do the conversion ($$$dont 4 get about all the items to complete the conversion$$$). not to mention total hours of your life too. and thats just the begining of the itch you'll have afterwards. if the price of a 87-92GTE is out of reach, then wait a little longer and you'll be happier in the long run. luckily for me i don't have the balding gene, cause i've pulled all my hair out (but it keeps coming back) numerous times ironing out bugs. i cant even imagine the torture one goes thru starting from n/a to turbo. trust me on this one, you will get the bug once you start modding any turbo car. and yes there are rewards for time and $$$ invested in modding any car, just dont go to far back (refering to starting point). invest your time on improving todays methods and ideas. just my 2psi...