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Click on image for the lowdown. 
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| | | Forums66 Topics128,131 Posts1,056,723 Members48,454 | | 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 2000 Posts: 248 'Bolter | | 'Bolter Joined: Aug 2000 Posts: 248 | To my knowledge there are at least 3 type.
The most recent had only one opening and that was for the PCV elbow that threads in the hole and points the PCV vertically.
Some model had no provision for the PCV to be intalled and where vented downwards by a 1 inch sheet metal tube.... usually dripping with oil on the open end.
An earlier model... also with no provision for a PCV had a screw on cap....sorts squaring in appreance.... it allowed owners to pour engine oil directly into the crankcase and also had the large 1 inch sheet metal tube angled downwards.... on tired engines that vent pipe would puff smoke and drip oil.....
Bob
Bob C.
CMP Heaven
The Hammond Barn
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