Speed pro narrow rod bearings and the 3/4 groove main

[HuntedDuckV351]

Speed pro narrow rod bearings and the 3/4 groove main bearings. Whats your thoughts on them? Will be used with a molnar 4" crank. Will be a race only motor.

 

[Newbomb Turk]

Rod bearings are fine. I’d use full groove main bearings. It’s not a Chevy and it doesn’t oil like one.