Here's a 72 455 HO I built for another member on the forum here. Stock crank, H-beam rods, custom pistons, 7F6 heads and stock HO intake and Q-jet. Custom hydraulic roller spec'd by Paul C. that is very docile and runs the AC and Power brakes perfectly. With the stock RA manifolds in place it dyno'd 507hp at 5700 and 571tq. If you read through the thread you'll find head flow numbers, cam specs, dyno sheets etc... and probably some videos of the engine running on the dyno and in the car.
Ended up doing a custom TSP converter that flashes around 35-3600 but drives around really nice, and it has a 12 bolt Moser rear with 3.42's.
https://forums.maxperformanceinc.com...d.php?t=827701
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2019 Pontiac Heaven class winner
https://youtu.be/XqEydRRRwqE