I'm running a340-6pak, edelbrock heads and a Bullit hyd roller .540int .513exh lift and .224 and .228 duration @.050. 372 inches with 10.5 comp and it makes 469 hp with 493 lb of torque. Not in the car yet, but I'm happy with the numbers.
And that's about right. Hyd. rollers don't make alot more power than FT's unless you really push them and the valvetrain.
Going from FT to hyd. roller with similar lift, duration and lca is usually only worth about 15HP. But if you lighten up the valve train, use good springs, light pushrods, careful adjustment and a stout profile you can make 30HP over a FT. But it ain't cheap.
Brian