Comp Cams XR280r thoughts to given combo

I am wondering how the comp cams xr 280r would respond in following car engine configuration. The engine is a 451 with Edelbrock performer rpm heads, 10.23 compression, 440 source crank, rods, pistons, comp cams rockers, Edelbrock performer RPM intake, TTI 1 3/4 headers and going with a Holley Sniper.
xtreme energy solid roller
242/248 @.050 lift
intake lift .570 exhaust .576
lobe separation 110
The car is 68 Dart, TKX 5 speed trans, 3:55 gears 25.6 inch tire stock rear tubs.
The car is going to be mostly street with very occasional strip.
At what rpm would peak horsepower and torque be?
Would this be an easy cam on valve train?
Any advantage of running the comp cams sportsman lifters over the endure x? Other lifter recommendations?
Any input, thoughts, recommendations would be highly appreciated. Thanks