A quick follow up. FWIW, Howards recommends this cam for a 440 with the same TFS heads in a heavy (4200 pound) vehicle with a dual plane intake and 2200-2400 rpm stall speed.
It shows 2500 plus stall on Howard's website does that matter that I have a 2400 holeshot?,and do I still need headers with this or will manifolds be ok?