You wouldn't do it unless dropping it into the 172 shell. But yeah with the 172 box you use the 172 flywheel and clutch. You could make it work with the 6 speed, but from what i see it requires custom driveshafts and some manipulation of the chassis leg and then i think the ratios would be very short on 15 inch wheels. Perfect for track work but not for daily. I know theres a chap called chip running the complete 197 engine and box in a 172 whos had to go custom with alot of stuff and he has said the same regarding ratios. Running full standalone too, i think its a dedicated track toy. Me doing it this PMT way means i can keep the costs down and use oem off the shelf everything.