74 carb compatibility with 71 350 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sKnNyPpY · 12-27-2013, 01:20 PM

So I got my carb from Guaranteed Carburetor today and it is listed for a 74 not a 71. It has an electric choke instead of a divorced choke and an electrical type connection on the top. Will this work for me or should I send it back? I kind of like the idea of the electric choke. Would I just have to run 12v switched to it? 71 gmc 350 with th350. Thanks!

airdale94 · 12-27-2013, 02:12 PM

The electric choke would be ok w/ 12v switched power. As far as the conn. I belive that's for a computer to control the power piston. As I remember you can leave this unplugged and it will still function. The computer limits it's usage. I'd say it's from a 84' instead of a 74'. I'm not sure I would want it if it's a computer controlled carb. though. Can you send it back? Jegs has Quadrajets.

You could call them and ask them about it.

sKnNyPpY · 12-27-2013, 03:16 PM

Well customer service was certainly lacking, just short of rude. Apparently they went off my previously rebuilt carbs serial number that was off an 85 with the electrical removed and ignored my note that it was previously rebuilt and for a 71.

geezer#99 · 12-27-2013, 04:33 PM

Get the right one. The one they sent you will run rich and be a tuning nightmare.

sKnNyPpY · 12-27-2013, 04:41 PM

Ok customer service is taking care of me. They will rebuild my current carb for no additional charges. I wonder how many electronic carbs have been converted like mine. I'll send it in when I replace my intake manifold so I won't miss it.

12-27-2013, 01:20 PM	#1
sKnNyPpY Registered User Join Date: Sep 2012 Location: Columbia, SC Posts: 549	74 carb compatibility with 71 350 So I got my carb from Guaranteed Carburetor today and it is listed for a 74 not a 71. It has an electric choke instead of a divorced choke and an electrical type connection on the top. Will this work for me or should I send it back? I kind of like the idea of the electric choke. Would I just have to run 12v switched to it? 71 gmc 350 with th350. Thanks! __________________ Life is too long to go slow... 71 GMC 1500 Super Custom LWB 350/350 AC(replaced w/vintage air)/PS/PB 2.5 CPP Spindle, 1" CPP Drop Spring, CPP Front and Rear Sway Bars/DJM Flip, new General Spring KC 5 spring pack, HEI /IntReg Alt 20x8.5 OldSkools 5" BS, 275/45 Falkens

12-27-2013, 02:12 PM	#2
airdale94 Registered User Join Date: Jan 2007 Location: Topeka,KS Posts: 778	Re: 74 carb compatibility with 71 350 The electric choke would be ok w/ 12v switched power. As far as the conn. I belive that's for a computer to control the power piston. As I remember you can leave this unplugged and it will still function. The computer limits it's usage. I'd say it's from a 84' instead of a 74'. I'm not sure I would want it if it's a computer controlled carb. though. Can you send it back? Jegs has Quadrajets. You could call them and ask them about it. __________________ 68' C20. 283CI w/55CC 305HO heads, NP435 Close Ratio, Corp. 14 bolt FF 3.21, 75' front end swap (everything but the X-member). Last edited by airdale94; 12-27-2013 at 02:15 PM. Reason: add

12-27-2013, 03:16 PM	#3
sKnNyPpY Registered User Join Date: Sep 2012 Location: Columbia, SC Posts: 549	Re: 74 carb compatibility with 71 350 Well customer service was certainly lacking, just short of rude. Apparently they went off my previously rebuilt carbs serial number that was off an 85 with the electrical removed and ignored my note that it was previously rebuilt and for a 71. __________________ Life is too long to go slow... 71 GMC 1500 Super Custom LWB 350/350 AC(replaced w/vintage air)/PS/PB 2.5 CPP Spindle, 1" CPP Drop Spring, CPP Front and Rear Sway Bars/DJM Flip, new General Spring KC 5 spring pack, HEI /IntReg Alt 20x8.5 OldSkools 5" BS, 275/45 Falkens

12-27-2013, 04:33 PM	#4
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,576	Re: 74 carb compatibility with 71 350 Get the right one. The one they sent you will run rich and be a tuning nightmare.

12-27-2013, 04:41 PM	#5
sKnNyPpY Registered User Join Date: Sep 2012 Location: Columbia, SC Posts: 549	Re: 74 carb compatibility with 71 350 Ok customer service is taking care of me. They will rebuild my current carb for no additional charges. I wonder how many electronic carbs have been converted like mine. I'll send it in when I replace my intake manifold so I won't miss it. __________________ Life is too long to go slow... 71 GMC 1500 Super Custom LWB 350/350 AC(replaced w/vintage air)/PS/PB 2.5 CPP Spindle, 1" CPP Drop Spring, CPP Front and Rear Sway Bars/DJM Flip, new General Spring KC 5 spring pack, HEI /IntReg Alt 20x8.5 OldSkools 5" BS, 275/45 Falkens Last edited by sKnNyPpY; 12-27-2013 at 04:55 PM.



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