My book says used on 352,390,410 and 428 w/o air, 71.2 to 74.2 cc chamber volume.I have personally seen them on a couple of 67 T bird 390 motors.I have heard some say they were used on Mustang 390's etc, but I think they may have been drilled with the extra holes.
1967 S code GT Deluxe Coupe 65B
1966 Convertible 76B 289 4 speed
Descendent of Francois Seguin dit Laderoute,
Soldier Regiment d' Carignan, New France 1665-1668
Let me know what you find out because I have been told that the reason I have 428 heads on my 390 is because Ford decided the earlier 390 heads didn't breathe well enough and installed the 428's on late production '68s. I have an April , San Jose car.
I've never seen any documantation to the fact.
"Sometimes a man's life can depend on a mere scrap of information."-The man with no name
That's a nice Stang you got there
Funny you mention that about your car - I had a '68GT390 coupe that had CJ heads on it. It was also a SanJose built car. However, I think someone added them at one time. Who knows tho, anything was possible at the factory.
1. Never hear that story and really don't understand the logic but dod the casting dates on your heads "go" ith the rest of the engine
2. Ford's documents of the time don't mention such a change. The Technical Service Bullitens of the time would be the place things like this would have been share with the service department. Such a change would be a major item to mention considering that they even included very little detail changes in production. Examples in 68 included change in spark plug heat range, crank shaft pulley bolt change and so on
3.Another thought would be why would care if late 390;s didn't breath well? In fact this would be a great way to sel the CJ's in place of the 390's
Sorry but we hear tons of stories and few if ever pan out.
Do always love hearing these though. Best one so far IMHO was the one where the 65 Shelbys were built with 6 cylinders (guy even claimed he had one of these rare engines And Shelby swapped the K engines into the car while at his factory
Car looks great... always loved the 68 fastback GT's