.. spark plug recommendation ? ..

I favour NGK plugs .

I've been using them almost exclusively for ~15 years ; I say 'almost' , as I've had a couple of lapses :sign10: .

In my stock-except-for-minor-ignition-upgrades 1972 318
( lighter-weight advance springs in the factory-installed distributor , 6 hG-rated vacuum advance canister , Pertronix coil , and orange box ECU ) , I gap the plugs @ .040