Ok, here is what you must consider. An LS motor is very easy to find. You can usually find the whole swap for around 13-1500 which is extremely reasonable. You should then take a B16 head and put it on the b18 block. Then you have the best of both worlds but will pick up more power. The VTEC will kick harder. You wil be very satisfied. VTEC B16 heads go for between 500-800 dollars. You will shoot from 140+/- to about 175-180+/-
my friend has it done and all I can say is NICE