Ok this thread is going nowhere. Pick whichever you like. Both are easy to modify, and both have their pros and cons. Look around on the forums if you're going to modify your Supra and if you're interested in going fast, then go the turbo route (swap a turbo engine or do NA-T). That's about it. Most information can be found in the stickies for NA-T or N/A modding. Once you're turbo, do the basic bolt-ons (DDP/Exhaust/Intake/MBC) then you'll make good power for cheap. Keep in mind you need to make sure everything is maintained very well or you'll end up broke like all the other Supra owners around here.
Closed.