Oil pumps again...

Not joining/commenting on the above 'debate', but......

There are odd numbers bandied about for oil pump flow etc. The BB Ch must have one of the most restrictive inlet flow paths for the popular V8s. Long p/up tube, only about 3/8" internal diam. Then, when the oil gets to the block it has to negotiate a torturous path around a 90* bend with sharp edges. Sticking a HV pump & HP spring at the end of this invites sucking air into the system. Ch wisely increased the p/up diam for the hemi. As a comparison, the stock 60 lb pump on a Pontiac has a short J shaped p/up, about 6" long, 3/4" OD & 5/8" ID, smooth flowing.