Thanks for all the input. I will check the timing chain for stretch. It has a Hi-Rev 7500 electronic ignition on it, so I'm hoping that timing curve is decent. The initial timing is set to 12 BTDC and when I have tried to advance it further, the crappy California gas can't keep it from pinging.
Did you recurve the distributor ... shorten the mechanical advance .. before advancing it that far, Stock Chrysler distributors , even those sold thru Direct Connection and Mopar Performance, have 30 degrees of mechanical advance so it's not a wonder why it pings at higher RPM.
