I just swapped a gsr head onto a b20b block. Aside from the intake manifold being the shittiest thing ever, it runs like shit. It idles just fine, and revvs up in neutral like normal. But, when I am actually driving it, it feels bogged down. No power at all. I haven't wired the vtec yet, and I am still running the LS ecu, but I thought it would run like the b20 did before the swap. Do I have to wire the vtec for this to work right, or am I missing something else???