I recently orderd a new distributer from a well know´n company that made a better curve built in a Mopar unit whit out vacume can and when i recived it i lookt at the rotor location on it and compared it whit my old unit by simply placing the reluctor tooth strait to the pick up on my old one and it whas almost dead on center of the brass in the cap but the new unit whas not.... This picture shows my Mopar Perfromance that i have been using for 4 year´s !

Here is the cap were you can see were the spark hits on the Mopar Performance unit i have used pretty centerd

And last here is the rotor location on the new unit that show´s that the rotor will throw out the spark before the rotor is in phase whit the brass in the cap so mabee you also should look at some of your distibuters guys im guesing this one will shoot the spark at the corner of the brass in the cap and that maybe isent so good

P Body i will do that ! I discoverd that they made marks on the pick up plate before the took it apart and lockt the plates together and they dident get it strait up so i did that first and that almost made it line up to the brass Im simply trying to tell what you could get so look at it before you install your distributers I also dident like the end play on the reluctor shaft as it whas to large travel so i took of a locking washer under the screw that holds the reluctor unit together whit the shaft that run threw the body of the distributer down to the drive gear in the block !