727 trans mount in an early A ???

Just discovered this 65 dart has shallower crossmember than 67up.

View attachment 1715739841

I'm not quite sure what you're saying. Is your car a 65? Is the mount a 65 mount? Is the crossmember a 65 crossmember? If all three answer are yes, it should fit. If it doesn't something is wrong. Maybe the tailshaft housing of the transmission is an oddball and lager than a normal one??? Time to do some detective work.