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Click on image for the lowdown. 
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Mod | | | Forums66 Topics128,049 Posts1,055,675 Members48,426 | | 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!
| | THANKS!
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: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | I have a serious rodder buddy that swears a 4 barrel gets him better mileage than the old style one barrel carb(s). Insists that crusing down the highway, the four barrel is running on two relativly small primaries vs one large throttle plate. His theory makes since to me and should hold true with the Holley-Weber type progressive carb.
Many other factors though as mentioned above.
I belive my truck runs much better, not as rich and plugs not as sooty after going with the HEI. | | |
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