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Mod | | | Forums66 Topics128,109 Posts1,056,268 Members48,439 | | 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: 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? | | |
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