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Click on image for the lowdown. 
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| | | Forums66 Topics128,154 Posts1,056,838 Members48,456 | | 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
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on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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#50565 09/30/2005 4:52 PM | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | It is almost imposible for a 1959-62 engine to plug the oil supply to the head. Up through 58 the oil passed through a 1/16" restrictor which can plug up, but in 59 they increased the hole to 11/32"(the size of your valve stems),tuff to plug.
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