The heads are world product windsor sr heads
They are cast iron
62 or 64 cc not exactly sure but no more or less then this.
2.02 int valves manley
1.60 exh valves manley
The heads use screw in studs
They were set up for a 1.55 spring installed at 1.900
They were never milled.
As far as milage, super low. They were used in my 66 fastback for about 3 months. I drove it very rarley. Due to me opening my own resto shop I just did not have the time to complete the car so I pulled the motor and put it in storage. So I would say the heads are basically like "new" If you gave them a good cleaning and put springs on them and run them.
The heads are in really good shape, they are painted ford dark blue. If you want I could take some pics. And there is no reason why they would'nt work with efi
ken