I thought the offset R/C bolt pattern was only 55 to 57 & the 58's were straight when they went to side mtr. mount set up??? Not calling you on this, I could be wrong, won't be the first or last time that happens!!! They are definitely early heads as no mtg. holes on the ends for acc. to bolt on to.. Pete
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I can only please one person a day, Today is not your day!!Tomorrow doesn't look good either !!!!