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Click on image for the lowdown. 
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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
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| | | | Joined: Dec 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | IIf you recess the seats, slightly relieve the head surface around each seat down to the new seat depth.
This unmasks the seat so that flow begins immediately the valve cracks open. It can be machined at a 15° angle for the intakes and 30° for the exhaust. | | |
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