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#51605 10/28/2005 5:45 AM | Joined: Sep 2004 Posts: 19 Apprentice | | Apprentice Joined: Sep 2004 Posts: 19 | i have a 2 barrel carb on a 307 gmc engine it needs to be replaced popular opinion says to replace with a 4 barrel which would take me off the road for awhile without a garage to do this right for example new manifold etc..... so i want to replace this for the moment with a new 2 barrel where do i find a decent new 2 barrel carb or what kind of throttle base plate do i need to get to have a 4 barrel mount on the existing system i am using now has this ever been attempted with a 4 barrel on a 2 barrel mount | | |
#51606 10/28/2005 11:11 AM | Joined: Jun 2001 Posts: 85 Wrench Fetcher | | Wrench Fetcher Joined: Jun 2001 Posts: 85 | You might try www.cliffordperformance.net or Tom Langdon, www.stoveboltengineco.com Jegs and Summit both sell Holley 2 and 4 Bbl carbs and Edelbrock 4 Bbl. Two barrel Holleys come in 350 and 500 CFM. Edelbrocks start at 500 CFM (but no 2 Bbls). www.jegs.com or www.summitracing.com I don't think you can squeeze a 4 Bbl onto a stock manifold. You may even have trouble with the aftermarket 2 Bbl types. However, I am completely unfamilar with the early L6 engines. When I converted my stock '68 292 from a Rochester Monojet to a Holley 390 4 Bbl, I had to replace the stock manifolds with an Offy 4 Bbl intake and Clifford headers. I was pleased with the results, but it was not as expensive in '78 as it is now to get the same parts.
Every 25 years I like to rebuild that 292 just for GP
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#51607 10/28/2005 2:50 PM | Joined: Jul 2005 Posts: 2,031 Shop Shark | | Shop Shark Joined: Jul 2005 Posts: 2,031 | ebay motors
they are usually pretty cheap, but it may take you awhile
Jim & Caroline
The highway is for gamblers, better use your good sense."
Gooday-that's my 1¢ answer due to the lousy economy ~ cause I ain't got - no . mo . doe
Every Shaver | Now Can Snore | Six More Minutes | Than Before ... | Half A Pound for Half a Dollar | Spread On Thin | Above the Collar || BURMA-SHAVE
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#51608 10/29/2005 11:40 PM | Joined: Nov 2002 Posts: 2,766 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,766 | What kind of a G.M.C. 307??? My listings show a V-6 305 with Stromberg 2-barrel carbs, and an L-6 308 that used a variety of Zenith and Stromberg 1-barrel carbs. I have no record of a G.M.C. 307 (listings 1913 - 1974).
Using a 4 barrel through a 4 barrel to 2 barrel adapter is a total waste of time and money. If you want more carburetion, best to buy a larger 2 barrel or change the intake manifold.
Jon.
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | |
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