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Mod | | | Forums66 Topics128,024 Posts1,055,395 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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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: May 2009 Posts: 107 Shop Shark | | Shop Shark Joined: May 2009 Posts: 107 | My Zenith- 20A, D18429; 7521D. Base inside bolt pattern of 2 & 11/16 in.
My Rochester C has a base number of 7004522C. Base inside bolt pattern 2&1/2 in.
I read someplace where the 216 has a base size of 2 and the 235 is a size 3? Or as I remember it anyway.
Take care,
Steven
No one can drive us crazy unless we give them the keys.
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