-> My old 57 Chevy (c1970) had two cylinders (8 & 7) that would foul a
-> plug just about the same time that you torqued it down.  I used
-> AC45's in all but those two, they got AC48's and liked them.
Yep!  My 460 F)or O)iling R)oad D)irt was the same way.  Don't remember
the FOMOCO plug numbers but three cylinders needed a couple ranges
hotter plugs if you were gonna idle it AT ALL!
I'd forgotten that.
 ^..^
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