....comp cams XR265HR high rpm....If so how did u find it?...What kind of numbers should I expect on the dyno with my mods.

slp long tubes, slp ory-pipe, 3" borla, msd wires, ngk Tr55's, under drive pulley, slp lid, slp cold air, and now comp cam xr265hr and valve spring kit, and diablo 2 programmer.

Also, what can the diablo 2 do for me in regards of tuning for this cam.

 

When I first starting looking for a cam I came across an article by superchevy.com where they did the xr cams in an LS1. Think the 265 gained about 30 hp on their test. Flywheel, I'd guess. It's a pretty small cam and should not be too hard to tune but I don't know anything about the Diablo.