well, yeah..those specs match Torch-style one in it..is 5/8 hex X 19mm N9YC length reach...gasket-seat......but that is 2-3 threads deeper than hole...and you can tell looking at old plug, there is an obvious demarcation line on threads...that last 2-3 threads on plug itself were exposed to flame/deposits in chamber. which makes me nervous..goes against very old automotive no-nos.. .lol..

Last edited by BriggsHandy; 06/12/24 04:10 PM.