Hey guys, do you know of any spark plugs which are a little shorter than this tapered-seat NGK UR5GP? Seems like I used shorter ones several years ago on another vehicle, but they may have used a gasket.
Thanks. I found some Accel shorty plugs that might work. Waiting to hear back from Holley about insulator length. Also, they seem to be available in only one heat range, which is equivalent to NGK 7.
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