The forged Pontiac rods from the early 60's were not very good. The later 455 SD were much better. We did a 455 SD NHRA Super Stock engine for a guy that used them in his engine. Back in the late 70's when he raced them, you could only get the rods from Pontiac, and only if you provided a VIN of an actually Super Duty car. Top secret I guess.
