[DavidNJ]

With those big cams I would like really big pushrods. 7/16 or 1/2 single tapers won't fit? The 7/16 would be 3/8 at the top.

Inertia shouldn't be over 1-2llbf-ft at 300rpm/sec. However, there is a friction difference between a 1.771 bearing and a wider 2.0 bearing. The questions is are small bearings worth 10hp or 25?