I am thinking about buying a set of ported 360-2 heads and intake for a 420 small block that I plan on building this fall. Right now I am running a 360/380 hp crate motor in my D-50.Do you think these heads would work very well if I put them on my crate motor while I was collecting the parts for the other motor.It would be hard to let the heads just set in the closet for a few months.