Quote:
Originally Posted by M2M
Original trucks were fitted with spark plugs with Post Office markings; Firestone brand I believe. I know an old boy that has NOS for sale.
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Not true, Original running chassis supplied by ford were supplied with champion 3x just like every A and AA. The Firestone POD plugs were installed by the post office garages as replacement plugs when the Campions were needing replaced. I believe this wasn’t until late 30’s early 40’s.