MM magazine did a 452 build with single plane and 11.5 compression and hyd roller and achieved 675 hp...
Id be more than pleased with 550 to 600hp with a motor that was dependable...

1972 Road Runner / GTX 440 4spd Dana 3.54 Just about to turn 26K original miles..

A boat, a GMC truck, some Craftsman Tools, LOTS of Zombie Protection, and a few Goldfish..

If you love someone set them free..
If they come back it means nobody else wanted them either..!!