MACH 3

Hello everyone, i'm writting to you to get some direction with my build. It seems that every Skyline forum has covered this subject in part, but i would welcome your advice, expertise. Having blown my RB26 bottom end i'm going the RB30 route and have a few questions: who would you recommend to build me a fully prep'd engine Who supplies billet cranks for the RB30 and lastly is there an RB31 (AKA Jun's R33 Hyper Lemon) or is this the RB30 thats been open out a little. best wishes Mach