I have yet to verify the ratio but i recently purchased a 455 that has a small ultradyne solid roller and the original owner swears 1.8 harland sharps rockers on it, under stock chrome valve covers too. when i bought it, I only pulled one rocker cover, as it was enough to know this was a well built /executed motor and the sharpes.
I was skeptical, about even the roller cam, until i snaked a camera down into the valley area. Pleasantly suprised.
Ill slide a dial indicator on them at some point. This motor would have been done in th early 2000s before we had access to many hi performance parts and rockers as we do now.
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1969 carousel red firebird 455, richmond 5 speed
1964 540 gto
1971 lemans sport convertible
1972 Maverick under slow construction
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