47-55.1 Williams Header install - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Jemezcrusher · 12-24-2018, 03:38 PM

I am fitting my Williams headers up along with the Offenhouser manifold. I understand the hold down clamps have to be modified to get equal pull on both manifold and header. I did not disassemble so not sure about the order of the clamps. Looks like the two small ones are on the outside while the four bigger ones run in the middle four holes?

Just want to verify before I start grinding on stuff

Jemezcrusher · 12-31-2018, 08:16 AM

The intake manifold is narrower at the bolting flange than the exhaust

I ended up adding 3/16ths to one side of each hold down clamp the ground to fit. Took a while but turned out OK I think

mr48chev · 12-31-2018, 02:51 PM

Good to see that you got it figured out.

Janky59 · 12-31-2018, 07:16 PM

Hey Jemez, small world - I'm tacking this same job today on my '59 Fleetside, engine is the original 235 cu.in. I have everything apart, stuff painted that I wanted to freshen up while things are accessible, getting close to ready to assemble. In my case, I want to go with the stock intake manifold and the Williams split exhaust manifolds.

Doing some test fitting I can tell the stock throttle linkage will foul against the rear exh. manifold section, specifically the arm that runs vertical to the carb. Any suggestions from folks on ideas to remedy this? I'm thinking I'll have to bend a new arm. It's 1/4"Ø rod so I guess I'll go to a hardware store or the like and buy a length of steel rod and do it trial and error. I'm thinking I'll bolt up both sets of manifolds, get the carb. in position, then start eye balling things. It doesn't look like the original linkage can be re-bent to work to me. This is my 1st time diving into this sort of job so if anyone has any tips I'd appreciate it, TIA.

Jemezcrusher · 01-03-2019, 10:12 PM

Janky,

My 50 with the after market intake and two Carter Weber’s is going to be a job to figure out a good working throttle linkage. Probably trail and error with a bunch of quarter inch stuff till i figure it out. Going to have to modify the drivers side firewall support rod too as it runs in to the back carb right at the base

12-24-2018, 03:38 PM	#1
Jemezcrusher Registered User Join Date: Nov 2015 Location: Jemez Springs, NM Posts: 434	Williams Header install I am fitting my Williams headers up along with the Offenhouser manifold. I understand the hold down clamps have to be modified to get equal pull on both manifold and header. I did not disassemble so not sure about the order of the clamps. Looks like the two small ones are on the outside while the four bigger ones run in the middle four holes? Just want to verify before I start grinding on stuff

12-31-2018, 08:16 AM	#2
Jemezcrusher Registered User Join Date: Nov 2015 Location: Jemez Springs, NM Posts: 434	Re: Williams Header install The intake manifold is narrower at the bolting flange than the exhaust I ended up adding 3/16ths to one side of each hold down clamp the ground to fit. Took a while but turned out OK I think

12-31-2018, 02:51 PM	#3
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,269	Re: Williams Header install Good to see that you got it figured out. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

12-31-2018, 07:16 PM	#4
Janky59 Registered User Join Date: Feb 2015 Location: Salisbury, MD Posts: 91	Re: Williams Header install Hey Jemez, small world - I'm tacking this same job today on my '59 Fleetside, engine is the original 235 cu.in. I have everything apart, stuff painted that I wanted to freshen up while things are accessible, getting close to ready to assemble. In my case, I want to go with the stock intake manifold and the Williams split exhaust manifolds. Doing some test fitting I can tell the stock throttle linkage will foul against the rear exh. manifold section, specifically the arm that runs vertical to the carb. Any suggestions from folks on ideas to remedy this? I'm thinking I'll have to bend a new arm. It's 1/4"Ø rod so I guess I'll go to a hardware store or the like and buy a length of steel rod and do it trial and error. I'm thinking I'll bolt up both sets of manifolds, get the carb. in position, then start eye balling things. It doesn't look like the original linkage can be re-bent to work to me. This is my 1st time diving into this sort of job so if anyone has any tips I'd appreciate it, TIA. __________________ 2018 BMW R1200RT 2013 Aprilia Tuono 2012 Ford Flex 2011 Ducati Hypermotard 1959 Chevy 3100

01-03-2019, 10:12 PM	#5
Jemezcrusher Registered User Join Date: Nov 2015 Location: Jemez Springs, NM Posts: 434	Re: Williams Header install Janky, My 50 with the after market intake and two Carter Weber’s is going to be a job to figure out a good working throttle linkage. Probably trail and error with a bunch of quarter inch stuff till i figure it out. Going to have to modify the drivers side firewall support rod too as it runs in to the back carb right at the base



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