Hey im rebuilding my b16 and i have some questions concerning the rebuild. first question, when reinstalling the crank mains, they are numbered with an arrow on each one. how where does number 1 main begin and which way should the arrow be facing? second question, is it neccessary to replace the crank main bolts with ARP ones if im turbocharging my civic? third question, im replacing everything in the top and bottom, do the valve guides need to be replaced as well? the engine has 100,000 miles on it. final question, which setup/company is the best setup for turbo-charging. I want pistons, crank, cams, rods, the whole thing. thank you for taking the time to read and answer these questions.