if i were u ..id look for a b16 motor..then worry about a b18 bottom end..u can build while ur usin the b16..since on the b16 u can use wiring harness ecu water pump oil pump with ur next build since they will be better then the non vtec equipment. all ull need is a nice bottom end with arp rod bolts and a gsr/itr timin belt and a tapped head/block for oil..