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#11
08-25-2024, 09:10 PM
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Virgin 48 heads generally spec at 72cc’s, while 62 heads come in at 75cc’s. (There’s a theory that 48’s used on 350 HO’s may have been machined as small as 66cc’s — but that’s another unresolved debate). The 48 was matched to the 068, while the 62 was matched to the 067 owing to the profile and compression characteristics of the cam. Lots of threads on this topic back in the day. Rotella’s book canvasses this nicely.
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'69 R/A III Firebird Convertible 14.0s @ 100.8mph AMA/OEM/OER |
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