Originally Posted by POWERSMOKIN
heres the #
quick Google search reveals it as a Ford 289ci.
even more info from another forum
C5AE-6015-F breaks down like this:
C=decade of the 1960s
5=year of the decade - 1965
A=car/truck model line - Full-sized Ford car
E=engineering department - E is for engines
6015=basic part group number - 6000s are engines
F=design change-F would be the sixth version of the part
I don't recall 300 engines going into cars, so I would hazard a guess to say that what you have there is a 240 out of a big Ford car.
I hope this helps.