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499 Posts
Discussion Starter · #1 ·
Our 351c 4V was running well with autolite 24 plugs. It has 4v heads, mild cam, headers and pro-form carb. Pertronix ignitor ignition and flamethrower coil.

Tye autolites were doing fine, but I've always used NGK plugs, and would like to see if they run as well or better.

The closest match I've seen comes up as NGK BP6FS. The guy at AutoZone couldn't find them by that number, he said he thinks they are ngk 5034. Is this true? If not, what is the model number for the bp6fs plugs?
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