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Click on image for the lowdown. 
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| | | Forums66 Topics128,041 Posts1,055,480 Members48,424 | | 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: Aug 2019 Posts: 17 New Guy | | New Guy Joined: Aug 2019 Posts: 17 | Bought a temp sending unit for my 1955 cameo 235 eng but the 3/4" ish thread size is too big it should be closer to 1/2" ish so think head may have been changed ? Question is what year did thread size change to smaller size ? | | |
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