I might buy a 89 rx7 with a dead engine for 200 us...
What should I do with it? Not too expensive engine wise.
I have a budget of 3000 us.

 

turbo da bitch...........

 

What about ls1 or VG30DE?

 

if you're gonna go piston do LS1........PM gnx7 he's done a bunch.

 

Honestly, keep it a rotary, I know someone from the other engine section is going to be "Its gay and sounds like a lawnmower." Which is stupid, keep the rotary and go turbo, you'll make plenty of power to shut up most V8's and keep the uniqueness of your car.