So, right now your drive train is build for that slanty, you have a 904 tranny, and a 7 1/4 rear axle. If you do your upgrade, you need a v8 k member, or you need to get special motor mounts for that /6 k member. If you upgrade to the 360, you'll need to replace your 904 and 7 1/4 to a 727...