ok i have a ls motor with a built block (all internals are brand new). i want to go ls-vtec. i want to build ls-vtec using oem honda parts. basically all type r internals in the head. now, i can come across a 1st gen b16 head pretty cheap, and throw all type r internals in there or i can get a hold of a b17 head (old school gsr) and do the same. now i hear people say a b18c1 head has the best head flow but i dont want to hassle of finding one nor do i want to pay the arm and the leg that it costs. is there a big difference from from the b16 and b17 head? if the both heads consist of the same internals on a ls block, which would be faster, reliable, better? thank for your help