ok im gona do a LS/VTEC swap, with a GSR head, shuld i get a GSR harness ?? waht kinda ECU shuld i get also? im throwing it in my 91' CRX DX, if i do use the GSR harness do i have to do any modifications to it?? or any other harnes i would use?? and shuld i chip my ECU?? if so what shuld i chip it?? thanks for your help