Have a 440 RB I am building and am in need of some good flowing aluminum heads for it, had a set of 906 re-worked iron heads but had cracks in the valve seats! Have a set of Harland Sharp rockers for it so I do not want anything that needs off set rockers. Used is OK as long as they are in good shape! Build is a 10.5:1 compression, .545 comp cam, JE forged pistons, stock steel crank, and all the goodies. Working on a budget, does anyone have anything?