Ok, so I lucked out and unknowingly bought a b20 with a p8r head. From what I've read it has bigger intake valves, bigger chamber blah blah blah.. What I'm curious about is, how much would I benefit (if at all) from getting an aftermarket intake and better injectors? What would give me the biggest bang for my buck? Right now it has an obd-0 b18 intake in it so I'm sure that can't be good for air flow.. Would a bigger TB on the b18 be worth it? Also, am I safe to run 87 octane or should I run slightly higher octane. I know there's 3 different comp ratios for the b20 setups and if I read correctly I have the one with high 8's? Thanks in advance!