ctr's would be ideal for a nice set of cams due to the compression. Have you considered using skunk2 tuner series (not pro series)?

Toda spec A's make decent power on a b16 too, I think I've seen 170-180ish on honda-tech. Yes I know they are outdated, but they have been proven.

As far as clearance goes, just clay your motor if you're worried about valve to piston clearance.