Posting this for a friend.
He is running a 73 Olds 455 and wants to add roller tip rockers/guide plates.
He got the roller tips/guide plates off ebay, which sends off sirens in my head the minute I hear this, but hey, it's his money...
He tells me the guide plate holes are slotted and he doesn't know how to position them.
Also says the push rods that came with them are longer than stock.
That's a new one to me never having had anything Olds.
Also, he does not know the adjustment on the rockers: Zero lash plus 1/2 turn? 3/4 turn? ??
Need some solid advice here. I don't want to see him break this motor out of ignorance.