My heads are TEA, total engine airflow, stage 2.5 317s. They have been decked to 69cc from the 71 cc, i think that is about .020 off the head. They have comp cams double springs, competition hand porting, 2.05 Ferrea intake valves, and 1.60 exhaust valves. They also have the Judson port design, which was the best flowing port design at that time. Heads are pretty much new at this point, i just had them gone through. New valve job, new seals, new guides, new chromemoly retainers and locks. Springs are used but they said are fine, set up at 140 on the seat and 400 open at .600. Springs are good for .6-.625 lift.

Flow numbers are:

I E
.1 68 51.7
.2 140.4 118
.3 208.7 170
.4 267.1 215.2
.5 302.6 260.6
.55 318.8 271.5
.6 328.7 279