Thanks, but I had the distributor in and the rotor pointed pointing at #1 with #1 at TDC for sure because it inflated a balloon and the timing pointer on the crate motor was right on 0 on the balancer and this tech guy told me to move my dist. 1 tooth backwards.......here is my question, if I have a perfectly fine and correct engine and I pull a distributor out and put the e-curve in exactly the same spot, that is where it is supposed to be right? There is no reason why I should ever be a tooth different am I correct? And I can turn the dist. base from that correctly installed MSD e-curve distributor enough to achieve 34 degrees BTDC right? But the truck is running but I don't think it is right.... Can an engine run fairly well with a dist. 1 tooth off?