yes u can do the swap cuz ive dont it but instead of a si yead i used a 97 ex head on my 92 dx block all u need is a 92-95 single vtec head gasket and timing belt and use the head bolts from the dx cuz the si head bolts are to short and u will strip the block when u torque them also when u take off the dx head there is a copper looking plug in the middle of the block towards the firewall and u have to take that out or ur vtec will not work cuz there is already a plug in the head and the pressure wont be correct for vtec if u leave the other plug in there, i have a right up on nyce1.com on how to do it its called a mini me swap