1965 Mustang 289 engine numbers
Hello from a "new guy" with a question for those with more experience with numbers location and meaning.
First my car, I have a 1965 Mustang coupe with a build date of Dec. 14 1964. It's been totally restored to original and I have much written documentation to include order sheet and window sticker. Recently i decided it was time for a gasket update as due to my lack of driving it it began to leak from several places. As i figured several gaskets had just tried out. During the process I have been trying to find as many parts numbers as i can to verify it's originality. I also am taking this opportunity to update the cooling system as the car was starting to over heat when ever i did drive it.
So to my question, I found this number on the block C5AE-6015E and directly above that is 4L20. Can someone confirm for me that is a build date of Nov. 20 1964 for the engine? Do these numbers mean anything else of interest?
Originally the car was a 289 2 barrel carb , automatic with factory air, P/S I updated the front brakes to disc brakes and replaced the upper and lower ball joints and added larger front sway bar.
During this update i will replace the manifold with a Performer manifold, add a Carter 4barrel carb, new Comp cam as well as timing chain just to wake it up a bit. Car already has dual exhaust however it's 2" .
With regard to the cooling issue i am replacing the radiator with a two row aluminum one with much bigger runners than the original one. adding a new performer water pump and a new 100 amp alternator( The alternator light was starting to stay on so ...).
I'm sure others have been down this road before me and I am open to thoughts , criticism or help regarding my choices.
Thanks for you input.