I have an older OS Surpass FS70 that I am trying to fit on my Losi Mega Baja, which originally had a Team Losi M26SS(.26) on it. My question is where do I find a clutch and bearing set that I can bolt onto the 70 crank shaft? the crank at the crank case is 9.5mm then steps down to 8mm threads, what i need is a flywheel-clutch-clutch bell-bearings-pinion gear, I have access to machinery to fab up engine mounts, I just need a drive system

We'd have no idea where you might be able to locate parts that are pre-made to just bolt on. We think you'll have to custom-modify existing parts or custom-make the parts you need.