lets say if i was to go LS/vtec. what are all the required parts i would need? i know i would need a complete vtec head, distributor, and ecu. i was wondering is it necessary to replace the pistons (higher compression pistons) and stronger rods as well? Since im in a budget right now... i was thinking of just doing the head swap w/o changing the pistons... would that work? would i still make more power than before?