Re: 3880492 small block heads
Jim are you thinking 3991492s? I can't decode 3880492 to anything in my references. The common 3991492 would be the over the counter replacement heads available after 1970. They came in different valve sizes as well as straight or angle. John that number has got me lost. Is the head cast with "GM"?
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1969 Z28
1972 Corvette
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