It would be better to retard the ignition timing to stop the pinging. There is a small dial type indicator at the base of the distributor with a slotted adjuster. The adjuster sould be to the right on the dial if the ignotion is set to spec and moved to the left to retart the timing.

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.