Ok, I have heard many different stories. Can someone please tell me, was the 915 head a one year head, or did it go onto 68 383's?

 

Well there was a "915" casting from 70-72 for the 360's with 1.88/ 1.60
There was 2 versions of the "915" in 67 the 2.08/1.60 version and the 2.08/1.74 version.
Also there was a "915" that came on the 340TA in 70 this was a 2.02/1.60 head and then again 0n the 340 from 71-72 with the 1.88/1.60 combo.

Then the 906's came on the scene in 68.

 

which engines got the 915 heads with the the 2.08/1.60 version and the 2.08/1.74 version?

 

The 383 & 440 in 67 had the 2.08/1.60, the 1.74 version of the same head was on the 440HP in 67.

 

so, if my head had the 1.60 exhaust valve, it was probably from the 350 horsepower 440?

 

If you give me the casting # of the heads I can tell you for sure.