hi there,, new to this site and searching for some info. ive been able to determine my 261 is March 17th 1959 yom.. with the lower compression head ( last 2 digits '50) .. its 3 speed is a bit of a mis-match of parts . but loosely pinned as 3 speed Muncie.
so then the block all the info I can find between the distributor and the crankcase breather is a "M" in a half inch square. no other id marks
am I looking in the right place?. I am under the impression the block number should be behind the engine mount between the distributor and the crankcase breather
