440 heads
racingsnake440 said
Caution racingsnake, I pulled apart 440's with 906's on one side and 452 and the other. Hell, I just did a 400 with a 452 on one side and a 902 on the other. The only way to be certain is pull both tappet covers and find the number, it'll end with a 906 or 452 or 902 or who knows. It's kind of like opening a christmas present.