Pro Maxx must have sold out of them, a local shop has a 408 going on the dyno in the next few weeks with them and are shooting for 600hp. The heads look good and CNC work is nice.
Any ported aluminum replacement head better make 600 on a flattop shortblock with some squeeze Even with a healthy flat tappet.
Last edited by B3422W5; 03/24/1911:48 AM.
69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight 418 BPE factory replacement headed stroker, 565 lift solid cam Best so far, 10.40 @127 1/4 1.41 best 60 foot 6.60 at 103.90 1/8
