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Click on image for the lowdown. 
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| | | Forums66 Topics128,038 Posts1,055,583 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!
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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: Jul 2011 Posts: 24 New Guy | | New Guy Joined: Jul 2011 Posts: 24 | Is there any advantage to replacing my single action fuel pump with a double action on a 216 Cubic inch? | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
The dual/double action fuel-pump/vacuum-pump provides vacuum to the wiper motor, assuring vacuum-wiper operation under full throttle.
| | | | | Joined: Jul 2011 Posts: 24 New Guy | | New Guy Joined: Jul 2011 Posts: 24 | Is that the only real difference? | | |
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