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| | | Forums66 Topics128,087 Posts1,056,115 Members48,435 | | 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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| | | | Joined: Aug 2006 Posts: 20 Junior Member | | Junior Member Joined: Aug 2006 Posts: 20 | Does anyone know where to get rebuild specs on a Rochester 4GC for a 59 spartan 100 with a 348??? | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy Spartan 100, the quick answer would be from a 59 maintenance manual, what exactly are you looking for? | | | | | Joined: Aug 2006 Posts: 20 Junior Member | | Junior Member Joined: Aug 2006 Posts: 20 | Looking for float level & drop measurements. I found a rebuild kit but it came with instructions for a Q-Jet. I would love to find a maintenance manual for my truck. | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy Spartan100, primary float level 1 43/64" secondary float 1 47/64 drop is 2 1/4" for both floats, pump rod adjustment is 1 1/16" hope that helps. | | | | | Joined: Aug 2006 Posts: 20 Junior Member | | Junior Member Joined: Aug 2006 Posts: 20 | 3B Thats a huge help. Where did you find that info. I am having a hard time finding tuning info(timing, point gap, dwell ect.) I don't think Chiltons goes back that far. Thanks again! | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy again Spartan100, spark plugs AC-42N gap .035, cam angle [ dwell ] 28-32 degrees, point gap .019 [new] .016 [used], timing 4 degrees BTDC, valve clearance hydraulic 3/4 turn after zero, lash idle RPM 475 with standard trans., hope that helps | | | | | Joined: Aug 2006 Posts: 20 Junior Member | | Junior Member Joined: Aug 2006 Posts: 20 | Thanks! I owe you a cold one | | |
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