Eagle cast crank would be a terrible start. Get at a minimum a SCAT cast crank, SCAT I beam rods and KB pistons if you are going to use the original open chamber heads or wiseco if you are gonna get a decent head (closed chamber).

The problem with the Eagle crank is the overlap area between the main and rod journals, they grind away all the meat there in an attempt to make them balance internally, long story short, it don't work, they still need mallory to internally balance and the crank is severly weakened, I have seen them break in an almost stock magnum motor, low compression, stock cam, stock intake, stock ex manifolds... took about two weeks.

I would talk to Dan at performance only in florida for a good deal.