This is weird, my 1951 Parts book shows Block 3835309 as the 41-49 (235) with no mention of 3693374. I then checked my 1959 Parts book and it has 3693374 as the 41-49 (235) and no mention of 3835309...
Did they recast the replacement block in the mid 50's and give it a new number making the cast date 1960?
Is there a serial number stamped on the pad next to the distrubuter?
Mike B
