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Click on image for the lowdown. 
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| | | Forums66 Topics128,028 Posts1,055,413 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: Dec 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | There are 4 different types of head:
1. Large or small intake port (yours is almost certainly "small", intake about 1-1/2")
2. Open or closed combustion chamber; unless you're going to replace the pistons you must use the type head you have since its shape depends on the piston dome shape. | | |
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