Originally Posted by cl440
Been running a 4.5" Molnar crank in the 540 for a few years now. Probably 850 horse. So far so good. No complaints.


I missed typed. We run a 4.25 Molnar crank with a 4.5" bore in our 540. Still very happy with the Molnar crank. I believe at the time Molnar was the only (other than high dollar or custom) crank manufacturer that had true chevy width rod journals with RB mains