Schubeck roller lifters, stroker HP estimate

OK, thinkin' way ahead to my next engine build after a pot 'o' java :drinkers:
Well seasoned '74 360 LA block (I already have it and it's never been bored) align honed, decked so pistons sit .005" in the hole. Eagle forged stroker crank, Eagle H beam rods, main studs and stud girdle from Hughes Engines. The rotating assembly will be internally balanced. HV Melling oil pump with a custom oil pickup and pan from Moroso. Custom forged pistons from JE or Diamond with the dish matching the combustion chambers on the large valve HD Magnum heads from Hughes engines with a set and measured CR of 11 to 1 and a quench height of .045". Heads will be fully ported locally. I plan on 10 degree locks and valve retainers too. Cam will be the Comp Cams Xtreme Energy 20-742-9 solid mechanical roller with 236 @ .050 duration and .564/.570 lift and Schubeck roller lifters. Probably run a Jessel belt drive too. Topping it all off will be either a Edelbrock air gap or a yet to be determined single plane with a 750 or 850 double pumper, as intake manifold selection is limited with the magnum heads. This will be going into a A-body with a 3000 stall 727 and 4.10 gears that will be used for bracket racing and occasional street usage. The car will most likely have an electric vacuum pump for the power brakes and I have a high tolerance for nasty cams on a street car. Oh yeah, also plan on large doses of N20 with an adjustable kit from NOS, and yes, I will be using a 140 gph electric fuel pump with 1/2 braided line from stem to stern with a bypass style regulator and a fuel cell. Now for the questions:
1. Anyone heard good or bad regarding the durability of Schubeck Roller X Lifters on the street and track? Are there any other roller lifters out there that can survive some street use? I chose these lifters as I do not want to be picking tiny roller bearing out my engine every 6 months and have heard a lot of horror stories.
2. Anyone got a dyno program that would give a HP estimate? I may back half this car if HP is much over 450.
3. Has anyone heard of rocker stud and or boss failures with the cast iron magnum heads and high spring pressures? Comp Cams recomended springs for this cam run 385# open
4. Any suggestons on rocker arms that can withstand this kind of abuse?
5. Anyone see anything wrong with this combo and have suggestions?