Stock Head Info

The 250 was supposed to be a 1968 383 head only. Sometimes you see it listed for the 440 but I have never pulled a 250 head off anything but a 383.

They flow like a 516 head, which is poor. The 250 appears to be a 516 head with a large combustion chamber. Porting them they will be better, but never really good.

We did a dyno test on a 440 that was making 387 HP. When we took off the 906 heads and swapped to a set of ported 516 heads the horsepower jumped to 449.

Yeah, you got them, go ahead and use them.