I’m Suprised a high port Motor needed 34* timing on pump gas maybe it’s camshaft related or efi related?
My 511 11:1 liked 28-29 w 330 kres
Different 400 hiports on my 540 13:1 on race gas and I’m
In the low 30s both carbed but wildly different camshafts
Might be some
Power and safety moving lower
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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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