Roger, the shop that did my engine advised me to not use that style of pump drive. I handed it to them and the assembly guy handed it back and said it'll break just below the distributor, said he's seen a bunch of them break there. I installed a stock one and "we" chose to keep the bearing clearances a bit on the larger side to flow more oil. My O.P. runs about 40 when hot.

What's the oil look like? I would also think it prudent to look at a few of the bearings to check for damage and see if there was a film of oil left.