Nice link for the dizzy wiki Cobalt.
Looks like I may need some of those nylon spacers. Since I didn't do anything with the block, heads or intake, I was most likely driving it around with the oil pump drive shaft tight against the distributor tang all this time.
This engine was not originally a TPI motor. I wonder if a different pump/drive shaft was used than what I'm running now. Maybe the L98 heads kept the intake higher?
Do you think I grind a bit off the bottom of the dizzy tang?