Anybody here done the swap from SBC to BB (454). Any big problems to look for. Clearences, exhaust, etc. Hooking back up to a 350 or 400 turbo (may even go to a 700r), will be going to a 1 piece driveshaft & floor mount shift. Any ideas on a complete rear end swap (maybe w/disc). Was going to build a big 400 mouse motor but affraid I'm going to need more torque for the weight of car. Any ideas??