4bbl for the Imperial

@ 83Imp, looking at your pics, it looks as though you are running a smogger TQ, which may be causing your pinging. What is the model number stamped into the base?
 
40-363.... from US rebuilders. It's for the small block 'non-lean burn' applications, i.e., pickups. I do have the bowl vent hooked up to the choke circuit, ported to the charcoal canister... that's the only emissions solenoid on it.

I put the old distributer back in it and it doesn't ping at all under full throttle - plenty of power. As others noted... pretty sure it was 's the springs in my aftermarket, non-Mopar dist.

40-364 has the front venturi solenoid, no vacuum advance port, and no way to adjust fuel mixture.... I knew I didn't want that one. lol
 
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