Ok, there is no way that I'm the first guy to do this. I was looking for a replacement for my destroyed steering wheel. The options to fit the shaft were few and I thought a bit expensive. Thinking back to when I raced dirt track, I had a brain storm. Or a slight drizzle. A steering wheel quick connect is a 3/4" shaft. $25 for the quick connect and $32 for a Grant classic wheel. No modification made to the shaft. I drilled a hole in the coupler for a roll pin. I might rig a spot weld on it. Cool thing is if the wheel is in the way while doing maintenance, it takes half a second to rip it off.
Mark.