440 power gains/ aluminum head advantages?

Remember IF you find rhe timing is off, you can play the game of using offset bushings or keys or whatever or even in combo with a tooth off to get the cam where it belongs. I've done that before as it really doesn't matter "how you got there" so long as the cam ends up where it's supposed to be.

I hate those bushings. I use the gears with multiple keyways or offset keys to dial mine in 4 degrees advanced. I work on 60 foot and the rest is easy.