because each motor series starts at 1001(or some at 1000). this is actually #3 in the 611 series, as the 611 series started at 1000. the Doylestown rig that was perverted into a pickup was 1001 in the R686 Series. besides, this one is a 1967 and Doylestown is a 1976. a couple hundred were built in between, regardless of serial number.
Quote:Going by the #'s so tell me why,please ?