I think it's currently useless. The only advantage it has over a 4 cycle reciprocating engine is weight and it's not a big difference. Putting a Ford 302 into a n/a second gen RX-7 increases weight by about 100 lbs, yet increases power by about 100 hp and increases torque by almost 200 ft lbs. The Ford will be more reliable, cheaper, and last longer. If you put a 302 into a turbo RX-7 the weight increase will barely even register.