Gingas,yeah like the other guy mentioned,number one is what can and can't you afford.Two,what's your goal 1/4 mile,street racing,reliability.Three,do you want a high reving engine low torque off line or big torque off line non high reving unless you go frankenstein(LSVTEC)or crv-vtec head.I have a 91 civic si I had 2 years and I've had the stock sohc 108 hp,then a jdm dohc ZC,B18A LS motor(130hp)people who did the swap lied said i had a 94 LS motor(142hp)wasted $3000k which what led me to a B16A.I love it.I had all kind of experiences in a short time.I love the high reving motor 8200rpm.I do notice the vibration.Is that all B series in EF's.good luck,gingas