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Old 08-07-2020, 09:32 PM
Dragncar Dragncar is offline
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Default BBC rockers on a Pontiac

I know there are a few guys who do that, CV1 heads are made for them also.
Crower has their 1.55 ratio Stainless Steel BBC rockers arms on sale for 249$. Normally 674$
About the best stud mount rocker you can get.

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Old 08-08-2020, 09:13 AM
Skip Fix's Avatar
Skip Fix Skip Fix is offline
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Length between stud to roller tip and stud to pushrod cup too long. A Crower 0.090 offset trunnion BBC with some short pushrods can work.

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1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
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Old 08-08-2020, 09:51 AM
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slowbird slowbird is offline
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Why on earth would you want 1.55 ratio??

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Old 08-08-2020, 11:10 AM
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Skip Fix Skip Fix is offline
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That ratio is probably a "break in rocker" reduced ratio so you do not have to remove springs for a flat tappet break in. They have 1.33 SBF ones that will work for our Pontiacs I've used on the 455 in my 78 TA.

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Skip Fix
1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever!
1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand
1965 GTO 4 barrel 3 speed project
2004 GTO Pulse Red stock motor computer tune 13.43@103.4
1964 Impala SS 409/470ci 600 HP stroker project
1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs
  #5  
Old 08-11-2020, 07:01 AM
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mysticmissle mysticmissle is online now
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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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