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Click on image for the lowdown. 
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| | | Forums66 Topics128,109 Posts1,056,266 Members48,439 | | 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: Apr 2002 Posts: 2,168 A teacher, but always an apprentice. | | A teacher, but always an apprentice. Joined: Apr 2002 Posts: 2,168 | Thanks what I’m looking for. A good strong pull throughout. Would it be low enough, Jerry, to warrant using a hydro boost? Or will the vacuum booster suffice? I was looking at 8-9” dual diaphragm for space saving with the lm7 heads/covers. | | |
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