mostly when a b20 fails its a b20z or higher compression motor then puttin a vtec head ontop of that makes cylinder pressure even higher b4 u start to boost. i personally have run a b20b 8:8:1 with a gsr head on 8-10 psi for over 4 years and was tunned by scotty at mainstream and makes 258-278whp on the dyno dependin on the psi bump and i always stay under 8000. shift at 7500.all i have done diffrent is use arp rod bolts as the rodbolts are under greater stress as a bigger piston is being slung up in tha bore at that velocity. 81mm as compared to the b20 84mm piston. id say do a b20b low compression on 8 psi and keep her below 7500 with out the rod bolts..