I did this same build and Mainstream tuned it and made 208whp with vtec falling out. James said they could have possibly made 215whp with Vtec working right.

I had a STOCK port full gsr head and block. full supertech valvetrain with ferrea flat valves. 82mm PR3 pistons... head had a very small shave so CR was like at 12:2. Buddy club spec 4 cams... performer x IM... 68mm TB... RMF narrow replica header. AEM v2 CAI. Stock gsr rods. arp headstuds, arp rod bolts... and of course... supporting fuel mods.

you get the idea. But yeah you will have to build the whole motor.