[Luce]

Wait a minute. Isn't the gear supposed to rub on the block? The clearance dimension for the end play in the distributor keeps the top of the distributor bushing from being the thrust face as it doesn't have positive lubrication.

Yea, I know it's a 5 month old thread. I was dumbfounded to learn that SBC dizzy is on the other side of the cam and the thrust tries to push the distributor out of the engine unlike Ford and Mopar where the thrust is pulling the distributor down (or the drive shaft in the case of the Mopar)

My block has a nicely machined surface for the dizzy gear to rub on.