Hmmmm -- excellent question! Maybe. How do we tell T from F?
On the 261's, anyway, there appear to be two different locations for the casting number -- to the front of the motor of the distributor or just below and to the front of the fuel pump. Does this correlate to "later" and "earlier" 261's, by plant location (Tonnawanda or Flint), or just by the whim of the mold makers when they were setting up each mold? See my two working exemplars below. Do they reflect reality?
And while we're at it, here's a later 261 (with Captain's Bars) -- what is the clock face looking mark in the date code and what is it telling us?
Can you tell I'm working on a casting code Tech Tip??
