Well I do have the tall block so that's what I'm going with. The Dart and Edelbrock intakes for the tall block are made for the stock distributer. The crank, rods and pistons are all new, balanced, and light (it's only .400 longer-6.535). All I'm using from the 427T is the block! The rods are included in the speedomotive kit too. And I know not to use the truck rods, they're beat anyway. I should have said that but a lot of people say they're much stronger too.