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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: Oct 2010 Posts: 40 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2010 Posts: 40 | my gm factory hei dist has the following i.d. stampings on it.1103274 7m20 anyone out there know what they mean? | | | | | Joined: Jul 2006 Posts: 187 Shop Shark | | Shop Shark Joined: Jul 2006 Posts: 187 | As far as I know, the distributor bodies are all the same. The 7M20 is what differentiates the application. I'm taking a stab here but my educated guess is the 7 stands for a 7 pin ignition control module. The control module, springs and vaccuum advance are also different from applications to application. Maybe the M20 refers to that. ????? Anybody else? | | | | | Joined: Oct 2010 Posts: 40 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2010 Posts: 40 | makes sence,i'll take a look at module to see if infact there are 7 pins.stand bye | | | | | Joined: Oct 2010 Posts: 40 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2010 Posts: 40 | i found a 4 pin module inside.maybe a 7 belongs in there or did at one time.but thats what i found. | | |
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