1964 1/2 Mustang Engine Block Stamping
 

New to the site. I have a 1964 1/2 Mustang and I know what the VIN number says its supposed to be (Type D engine). However their is some issues with it possibly being a F type engine.

I am trying to figure out what my engine block stamping means on my Mustang. Can someone send me to a good website that calls out what the stamping number means?

Thanks for any help.