i would swap out the head with a b16a2, and have that head ported and polished...i would then build the valve train with skunk 2 cams, and cam gears, and also their valve springs and retainers..this will allow you to rev up to 10k and make power all the way. if u swap heads u will need to have the head tapped for the oil line since u are changin it to vtec.....if u want some indepth help u can email me at pinkys43@aol.com