The TZ has as much power as some big blocks and even more then some. But it is still a small block and would take modifying or making a motor mount. I think you would just be better getting a budget big block.

I have a HPI MT 1 3/4 (highly modified MT 1) with a TZ 18 in it and it is wicked. I had to gear it really high just to keep the front wheels on the ground most of the time. When I hit the throttle all four tires are ballooned in about 4 feet and that is with it geared really high.