didint read the whole thread; but my truck made 670 on a mustang and 975 on a superflow if that makes you feel better! the mustang was at schieds the day before i ran a cummins laid 980? on dunbars dynojet and 690? on the same mustang i ran on.
when it ran it seemed as if there was no load on the truck at all, like it was just free revving, i gave it two shots and had them take it off; no thanks!!