ok. i have a '90 si shell with dx motor. planned on puttin a d16 vtec head on d15 block. do i need a new ecu or any kind of new tuning since the d15 i have now is non-vtec or not? also, if i got hondata put on the stock ecu, would it still work correctly? if all that will work, anybody got a d16 head or ecu (if needed) or hondata for sale? thanks!