Found this on another website....this is what has piqued my curiosity again about using these heads...You be the judge.

Street combination:
Hiperf 454 4bolt block (std boring)
"Peanut" oval port heads (mild port work)
2.19/1.725 Manley raceflow valves + multiangle valve seats (30,45,60 deg.)
CompCams magnum rocker arms
stock 8.75 to 1 cast pistons
stock rods
stock cast crank
Edelbrock torker intake
552/555 230/236 @.050 (CompCams XE274H)
Holley 850DB carb
FlowTech 1-7/8 headers

Dyno result with 3-inch exhaust & pumpgas: 526ft/lbs@3500rpm, 468hp@5100rpm (over 500ft/lbs torque from 2800rpm to 4800 rpm!)