MLS head gaskets RA ?

ebone84

20+ Year Stangneter :roc</strong><span class=
Jun 8, 2004
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whats the RA of a stock block 70-100 im told. What can i do to make my block smooth enough to use a fel pro MLS #z1133, which needs an RA of atleast 60, or just use a fel pro 9333pt1, yes it's supercharged...thx