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**'68OrangeSunshine** · 07-09-2019, 05:25 PM

I used to use AC Delco R44XLS in my 292. A vintage L6 head uses plugs with a 13/16'' hexhead. I have a 1998 crate Mr Goodwrench 350 V8 in my '71 GMC Jimmy. The plugs in that require a 5/8'' socket.
I use Denso 3021's now, since AC Delco went to Mexico.
HEI Gap .045
Points Gap .035

07-09-2019, 05:25 PM	#137
'68OrangeSunshine Senior Member Join Date: Feb 2002 Location: Tucson, AZ USA Posts: 7,097	Re: 292 Questions I used to use AC Delco R44XLS in my 292. A vintage L6 head uses plugs with a 13/16'' hexhead. I have a 1998 crate Mr Goodwrench 350 V8 in my '71 GMC Jimmy. The plugs in that require a 5/8'' socket. I use Denso 3021's now, since AC Delco went to Mexico. HEI Gap .045 Points Gap .035 __________________ Every 25 years I like to rebuild that 292, whether it needs it or not.