Re: 239 bore.
Ronnie, thanks for good trick.
Frank, absolutely zero ridge , I cannot understand it on a standard bore.
Block is in shop now to get a guy to measure bore.
Have another Q, are (mushroom) intake and exhaust valves identical ?
I have a box of stainless valves that look almost new here.
Are these Ok to use in a standard block ? ie no hardened seats .
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