I've lost my boost

He’d need the Snout DriveShaft, coupler, bearings and seal.

He’s got a single key way on his crank, in which case he had to replace a harmonic balancer due to it cracking and upgraded to a better balancer .
Apparently he drives the car the way it’s supposed to be driven as he’s sheared his shaft. Upgrading to a 1.25 shaft will ultimately find the next weakest link, which will be the single key way on his crankshaft.

I’m not talking smack but it’s just a matter of time.
Yeah, it's interesting how using a roots blower changes the stress on everything.