This isn't exactly what I wanted to show you, but it will do:
Monster Miata
Years ago, I came across an article in a magazine where a guy had blown the engine in his stocker miata and decided to go as extreme as possible with it, no matter how outrageous it sounded. He put a Ford 302 engine, Borg-Warner T-5 tranny, and a custom drive shaft to an RX-7 rear end. I can't exactly remember times or anything, but I do remember thinkin " I want one. " and I still do to this day. Maybe when I hit 35 or so I'll give it a shot...
I would stick with what works, but remember that there's a reason they call it a "
Power to weight" ratio. The Ford 302 put out around 225 Horsepower stock in it's last few years IIRC.