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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: Jul 2015 Posts: 36 'Bolter | | 'Bolter Joined: Jul 2015 Posts: 36 | Best spark plugs for a 58' 235 engine? | | | | | Joined: Feb 2004 Posts: 29,792 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,792 | AC R-45. If you can find commercial-rated CR-45's they're much longer lasting, but they are extremely hard to locate.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | AC C42-1 commercial was the 1958 spec'd plug.
I use R-43 or R-44 or R-45 | | | | | Joined: Feb 2004 Posts: 29,792 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,792 | The 42's will be a bit too cold, unless the engine is running full throttle with a heavy load all the time. As the numbers get larger, the heat range goes up. Back when a wide variety of heat ranges was available, the general rule of thumb was 43 for mostly highway driving, 44 for town and country, and 45 for short trips and stop and go city driving. 43 and 44 plugs are getting nearly impossible to find.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The extended tip plugs are a great improvement on overhead valve engines. Like r45s or r44s in AC plugs.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Jul 2015 Posts: 36 'Bolter | | 'Bolter Joined: Jul 2015 Posts: 36 | | | |
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