i have an LS...im building my block now, i got 11.5 pistons eagle rods i got my pistons custom made and i gave the specs for my head so he can get my pistons made ( crower 404's, intake valves 1mm larger exh. .5mm larger) can i get a VTEC head and will those specs i gave the machine shop guy affect the head??

 

i think you should tell the machine shop guy what you are thinking of doing.
other than that, i hope you realize that ls vtec takes a lot more than just slapping on the head...