comp 280 magnum or mp 280 cams can't decide!

did the OP ever actually state what he wants out of the build? I'm probably expending too much effort here, but if you have a true 9.8:1 with J heads, and only a 2500 stall w/3.73 gears, I'd probably go with the suggestion of a dual pattern cam in the 230s @ 050...like a COMP XE, Lunati Voodoo, or possibly a Howard's...if the rockers and springs are up to it. But, IIRC, he mentioned running stock rockers...and if seeing the experiences of others is any indication, those have a habit of going to church with too much cam (holy rockers, ha ha)...

...then again, I'm likely putting too much effort/thought into this.