Big block valve stem length ?
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Big block valve stem length ?
I was comparing a intake valve from a '65 400 A head to a intake I have from a '68 C head. The C head valve is just under 1/4 longer.
The question is, what did Olds change to accommodate the extra length?
Is the pad on the head where the rockers bolt down taller on the C head?
Has anyone out there ever put the later valves in the early head?
The question is, what did Olds change to accommodate the extra length?
Is the pad on the head where the rockers bolt down taller on the C head?
Has anyone out there ever put the later valves in the early head?
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