I'm having a bit of trouble determining the correct engine ID codes for a 69 S code (390) with the Auto transmission.
I believe the correct code is K385S which is what ECS and Mustangs unlimited sell.
Virginia classics and NPD sell a K385T for the auto trans. They all agree on the manual trans as a K384S
So is the A/T car a K385S or a K385T?
Bill