I have a 93 lx 5.0 that has mac long tube headers.  I plan on replacing the  5.0 h.o. upper/lower intakes with gt-40 intakes.  I have a .600 max lift  hydraulic roller cam and billet alluminum 1.600 ratio       3/8inch hydraulic roller rockers.  Would I be able to use the components I have here with the gt-40p heads or not?  If anyone has any info. I would greatly apreciate it. 

You should be able to use everything you have for the heads.  Only thing that might not bolt up is the 3/8 rocker arms.  The heads may have a 7/16 bolt hole instead of a 3/8, but I'm don't know much about those heads.  Other than that, it should all bolt right up.  Good Luck.