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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!
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| | | | Joined: Dec 2000 Posts: 3,399 Gas Pumper | | Gas Pumper Joined: Dec 2000 Posts: 3,399 | I do not have the clear answer to your question, however it stands to reason they would have been AC Delco because that was a GM partner. AC44-5 comes to mind as to what would be original in 1955, however, the new version of that is R44. I am not sure if you can still purchase the originals. The R is for Resistor. The 44 is the heat of the plug. The 44's were the most popular (sold the most) in the late model 235's and early V8s. http://www.secondchancegarage.com/public/1955-chevrolet-235-136hp-6-engine-specs.cfm | | |
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