1966 Head Identification via Oil Cap
Can you see the head part number via the oil cap or is the valve cover required to be removed?
Trying to understand if a car I am looking at has oval or square heads.
Trying to understand if a car I am looking at has oval or square heads.
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Re: 1966 Head Identification via Oil Cap
I don't believe you will see what you want without removing the valve cover.
1966 - 425 HP with have rectangular ports and the 390 HP has oval ports. Attached is of my L72 head - casting number ending 858, not sure the casting number for the 390 HP
'66 heads will have the machined area and a small tapped thread for holding the spark plug heat shield.
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