Even just installing some RS MACHINES 84mm "JDM Type-R" pistons (Go to 85mm if you feel like paying for bore work), with stock shot peened 139mm rods, and balanced stock 89mm crank with ARP rod bolts would do awesome for a B20 bottom end with a VTEC head. You can build a 200whp B20/VTEC for rather cheap, using OEM internal components.

Mild porting to a PR3 (B16, B17, B18C5, all the same casting) head (Or just buy a bare Type-R head for $300 or so, stock ported), with Type-R valvetrain/cams/intake manifold/Max Bore "Type-R" throttle body, and a decent header/exhaust/intake combination, would do awesome with that bottom end. It would be absolutely fun as hell in a lightweight car.