A typical GSR with bolt ons (intake, header, exhaust) will put down about 155 whp. So yes you will need to go with more than that.
What I would do is get whatever intake you want, a skunk2 intake manifold, skunk2 Stage 1 cams, upgraded valve springs and retainers, adjustable cam gears, a DC JDM 4-1 header (w/ 2.5" collector), 2.5" Carsound cat, and a custom 2.5" exhaust system with the muffler of your choice (with a 2.5" inlet of course).
One thing no one has mentioned yet is that since your car is a '98 you will have to convert to an OBD-I ECU to run a Hondata. Depending on local laws this may render your car non street legal. An A'PEXi V-AFC combined with the adjustable cam gears will give you enough tuning flexibility to dial it in on a dyno.
Originally posted by forum95
I would not go with the crower cams, my resources tell me they break, I'd rather go with the ITR cams and swap/change the valve's/springs
That only happened with the first batch of Crower cams that came out like three or four years ago. The issues have since been resolved.
Still, Crower VTEC cams don't make as much power as skunk2. They do make really good non-VTEC cams though.