arp bolts would be the best. use either oem or acl bearings. youll need an oil feed line for the vtec solenoid, check out stealthmodeperformance.com for good prices on lines, kits, etc. i would personally just get a b18 block and bore it a lil bit. boring a b2o could be kinda risky. if ur serious about staying NA, i would go with some forged high compression pistons. if ur not sure. some 9:1 forged would be good for either or. on average, each 1 higher is ten psi
so if u have say 160 stock on 9:1, then with 10:1, theorhetically ud gain about 10hp, so 170hp, in theory