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Mod | | | Forums66 Topics128,026 Posts1,055,400 Members48,422 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Nov 2005 Posts: 123 Shop Shark | | Shop Shark Joined: Nov 2005 Posts: 123 | I read a lot of the old posts about plugs. My 1956. 235 used R44 spark plugs. No longer available what is everyone using for that motor today?? | | | | | Joined: Jul 2010 Posts: 592 Shop Shark | | Shop Shark Joined: Jul 2010 Posts: 592 | AC R45, available from Rockauto. | | | | | Joined: Dec 2017 Posts: 1,652 'Bolter | | 'Bolter Joined: Dec 2017 Posts: 1,652 | Rj12yc is the Champion resister (the old number was rj12y). You can also use a rj14yc if you think a slightly hotter plug is needed. The non resistor is j12yc and j14yc.
Last edited by Dragsix; 02/18/2018 12:52 AM.
Mike
| | | | | Joined: Nov 2005 Posts: 123 Shop Shark | | Shop Shark Joined: Nov 2005 Posts: 123 | The plugs I took out of motor was AC44. They were in motor when I got it | | | | | Joined: Apr 2005 Posts: 7,440 Bolter | | Bolter Joined: Apr 2005 Posts: 7,440 | If my memory serves me correctly there was AC43, 44, 45, 46. All interchangeable, with the 43 being the coldest to the 46 being the hottest. Any good parts store can get you spark plugs for a Stovebolt 6. If you are going for a concourse restoration you can get new old stock through eBay or the automotive swap meets.ðŸ›
Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne (Emily)
‘39 Dodge Business Coupe (Clarence)
“I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)
| | | | | Joined: Jan 2005 Posts: 310 Shop Shark | | Shop Shark Joined: Jan 2005 Posts: 310 | I use AC R44SX. They are what Tom Langdon recommended with the HEI distributor.
-Tim
'51 Chevy 3104 w/'56 235, 848 Head, HEI Dizzy, Corvette Cam, Split Manifold and Dual Carter YF's
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