Wood's '408' low-buck Magnum build!

I'm re-using my cam for now:
.005 @ 292 dur
.050 @ 226 dur
.200 @ 141 dur
.328 x 1.6 = .525 lift
112 LSA
108 Intake CL

I found out I have a 3 keyway crank, any thoughts on the effect of advancing or retarding it 2 degrees being helpful?