the #3 &4 cam bearing bores are smallest holes-did they install a #2 or 5 bearing? That would of been too tight and would kill bearing-cam turns 1/2 crank rpm and is primary oil recepticant-----(oils first)

On new block chamfer that dist hole and use the O-rings, also since your using rollers put restrictors in lifter gallies.
Don't bother trying to reduce windage as you really need as much oil slinging around as you can get.
Make sure that the oil is draining back from upstairs--------

Put 50w race oil in it