Quote:

everything was very clean and new both times
516 heads with 2.14 1.81 valves all done up



Torture

The oil holes on the heads that lead up to the rockers, did you blow out both holes on both heads? 1 hole tends to stop up as it is only used on one side. If you crossed up the heads, and didnt check the hole, then it can be plugged up. But it didnt cause you to spin the bearings, but will hamper flow to the rockers