When was the ellips Ford logo changed to the rectangular logo?
Current understanding is the change from the oval to the block FoMoCo design was during 65 production
There are a bunch of early styles they used including the ones marked
2701966
C4AF11450A (with Autolite & REPCO)
C6AF-11450-A (with Autolite & RBM) - have one with the "texture" 65fastbk was showing
Then the later C7AF-11450-A1 (with Autolite & RBM)
One provider produced these early upright styes with a plastic bottom using a couple of different engineering numbers
Started putting an article for the site together a couple of years back - got stalled with some other efforts