440 power gains/ aluminum head advantages?

For new? Yes. That does seem alittle loose. That's typical of older setup.

At least what I've seen. Not to say it's of every case.
yeah for a new set from what i've read it's a bit loose. people say 1/2 deflection is the point of replacement. that can't be the total loss of power though because it is probably only a couple degrees of movement. hoping the timing kit is out of degree. after work today i'll pull the intake and plugs and check the cam. answers will be given soon!