replace toyota motor w/ Wankel??

It has been done with VWs. My son got information on putting it in a VW Thing he bought. According to the literature the rotary fit under the rear deck lid. You probably would set the forest on fire if any of the exhaust touched any brush, as it runs very hot. I saw a single rotor conversion in Oklahoma that was for homebuilt aircraft applications. Also, the C.I. is 3 times what is published which results in very lousy gas mileage. That was the problem with putting it an airplane at that time. There are some other conversions out there now that claim to have solved the fuel consumption problem.

Some interesting rotary sites:

According to Rotary Engine Illustrated a rotary has twice the capacity of an equivalent piston engine. I had read before that it was 3 times?

Yeah, I was looking at that atkinsrotary site and it looks like they have the exhaust routed high and clear of the brush on all those sand rails...

I can't imagine a 635 rwhp sand rail! That makes me drool!