You can make b18c5 type whp and almost b18c1 type torque with mostlly all honda parts.

For instance, the z6-

p29 pistons (or pm7, same difference)
port the head properly (w/ 3 angle)
y8 intake mani (portmatched to head)
ITR TB (portmatched to intake mani)
Crower 2 or 3 cam (of course, springs and Ti retainers)
shot-peened a6/z6/y7/y8 rods
micropolished crank
stock injectors (balanced 240cc)
Holley 255 fuel pump
hondata s100 on the stock p28 ecu (should cost under 400 bux including dyno time; however, a cheaper route would be a good chip with sorta conservative timing maps)
balance the entire thing

If you can, add an 4.7 SRR final drive and you will be really flying.

That is it.

People for years have been running mid 13's with similar setups in full interior hatches.