I believe a k11 is lighter once depleted of it innards and extra junk and also more aerodynamic. The k10 is quite ugly and boxy and prefer a Sunny or 120y instead.
A qr20de 147hp stock would be plenty using
billet cams 40-50hp extra
better springs to go with cams
Jim Wolfe balancer removal kit 10hp
Extrude honed inlet, proper exhaust etc frees another 15-20hp
The QR20de has 1.9 rod stroke ratio!!! its made for NA tuning.
152.9 mm rods VS 136.3 mm for SR20de
147hp + 40hp cams + 10hp JW kit + 20hp exhaust, also removing the power steering, air con and replacing the flywheel with a lightweight version and better clutch would definitely free up another 15hp so the 220-230 mark is possible.
Beyond that dry sump lubrication, slight porting of the head, 10.8 compression pistons and better rods or working the stock rods, maybe electric water pump , total blue printing and re-balancing could account for another 15-20hp. Im betting some aggressive cams to help make that 1.9 r/s ratio come to life at 85000rpm and also aftermarket T type cylinder liners to close the open deck.