The always elusive CAM question..

The block is what you zero deck height. In other words, that means you mill the block until the deck surface is flush with the piston at TDC (top dead center). No annoyance at all. I simply want to make damn SURE of what you have before giving you any advice. You don't HAVE to zero deck the block. However, Chrysler blocks are known for their deck surfaces being uneven, so it's a good idea to square them up. Since the cost is the same, zero decking is a good idea. If you have the KB107s, then to zero deck height the block, you need to mill .012 under the 9.6" deck height. That means your deck height should be 9.588", BUT, you might end up milling .050" to get there, because the decks are generally high. But 9.588" is the number you need for zero deck height. You'll end up with probably 10:1 or a tad more, so you'll need a healthy camshaft in order to run on pump gas. I would say something in the 240-250* duration @ .050 area. Probably closer to 250. All of this of course is just my opinion. I am sure there'll be others.