Yep, still looking at options. Someone brought up Jegs 310's, which are supposedly Canfields, and I pulled the flow data down from Jegs and fed it to DynoSim. Dunno if I want to go this route (there are many many different options out there) but just check out the difference in HP & TQ compared to my old stock 990's. Yee HAW !
Note that this is all with my current build (cam, pistons, etc., the only diff being boost changes).
The top chart shows my current 990's & boost @ 8psi: 612/562 (HP/TQ)
The 2nd chart shows my current 990's & boost @ 10psi: 643/605
The 3rd chart shows the Jegs 310 heads & boost @ 10psi: 785/655
Quite a large jump in output. Of course, the 785 HP is at 7500 rpm and I'll never turn this motor that high and I know that DynoSim can only approximate the generated HP & TQ. Still, I expect I'd see very large increases in output with heads similar to these. Geez louise !