Here are a few more pics for those trying to understand what all this oil pump drive talk is about...
The crank is from the first R32 motor I bought, that had been thrashed beyond belief. The oil pump shown is from the same motor.
If you look closely, you can see where the flat spot is on the crank, and on the pump gear I removed from the pump, it shows that no more than 1/4" of the crank flat reaches inside of the pump gear...
This is shown by the area that looks as though its been rubbed, so you can see where the crank drive flat, and the pil pump drive gear flats touch each other. It isn't very much...
Also, you can see where the flat spot on the crank shows of it being kinda rounded off on the edges, This pump drive gear spun on the crank in my opinion, which is why the motor was toasted....
Moral of the story.... get the crank modded with the sleeve, or buy a R33 crank as I did, and sleep better at night...