915 heads

[Meep-Meep]

915 heads were first used in 66 on the big Chryslers as a 2.08" / 1.60" version, then later on the 67 mid size cars with the 1.74" EX valve when the 440 HP came out. Little secret here. The factory HP heads have a big "HP" stamped on the machined area where the accessory holes are. Great head to use for a hot street car.

 

[68 HEMI GTS]

915 heads were first used in 66 on the big Chryslers as a 2.08" / 1.60" version, then later on the 67 mid size cars with the 1.74" EX valve when the 440 HP came out. Little secret here. The factory HP heads have a big "HP" stamped on the machined area where the accessory holes are. Great head to use for a hot street car.

i think your thinking of the 516's on the 66's