1971 LS-6 fuel line to carburetor bracket

[Stanley S.]

I'm looking for the support bracket that holds the fuel line to the front passenger side of the carburetor on a LS-6. I haven't as of yet found anyone reproducing this bracket nor have I seen any on ebay. Does anyone know of a source for this bracket? Or does anyone have a good picture of its configuration so that I could fabricate one? The part number from the AIM is 3994043.

Thanks for your help.

Stan

[Joe L.]

Re: 1971 LS-6 fuel line to carburetor bracket

I'm looking for the support bracket that holds the fuel line to the front passenger side of the carburetor on a LS-6. I haven't as of yet found anyone reproducing this bracket nor have I seen any on ebay. Does anyone know of a source for this bracket? Or does anyone have a good picture of its configuration so that I could fabricate one? The part number from the AIM is 3994043.

Thanks for your help.

Stan

Stan-------


I know of no source for that bracket. The extremely limited market for such a bracket would not bode well for its reproduction. A functional, if not exactly correct, bracket could be rather easily fabricated. You will find a photo of an LS-6 with the bracket in the 68-72 Vette Vues Guidebook by M.F. Dobbins.

[John C.]

Re: 1971 LS-6 fuel line to carburetor bracket

Stan

I'm not sure this is exactly the same as the Corvette version, but I think it would be similar.

https://www.ecklerschevelle.com/chevelle-carburetor-fuel-line-support-bracket-396-375hp-l78-and-454-450hp-ls6-holley-1970.html

John

[Ron G.]

Re: 1971 LS-6 fuel line to carburetor bracket

I have a pretty decent photo of the bracket on my LT-1. The only difference is that the LT-1 bracket mounts to the right rear carburetor stud and the LS -6 Mount to the right front carb stud, but it is the same bracket. Again, I will try to get you a picture over the weekend.

[Mike E.]

Re: 1971 LS-6 fuel line to carburetor bracket

Stan

I'm not sure this is exactly the same as the Corvette version, but I think it would be similar.

https://www.ecklerschevelle.com/chevelle-carburetor-fuel-line-support-bracket-396-375hp-l78-and-454-450hp-ls6-holley-1970.html

John

Unfortunately, it is not similar.

[Dave S.]

Re: 1971 LS-6 fuel line to carburetor bracket

Unfortunately, it is not similar.

This should answer your question. It's on an LT-1 but they are the same bracket as Ron says.

[Joe L.]

Re: 1971 LS-6 fuel line to carburetor bracket

I have a pretty decent photo of the bracket on my LT-1. The only difference is that the LT-1 bracket mounts to the right rear carburetor stud and the LS -6 Mount to the right front carb stud, but it is the same bracket. Again, I will try to get you a picture over the weekend.

Ron------


I do not think that the LT-1 and LS-6 brackets are the same. The LT-1 bracket has two 90 degree offsets. The LS-6 bracket is essentially "flat".

[Mike E.]

Re: 1971 LS-6 fuel line to carburetor bracket

Ron and Dave, I have to agree with Joe on this one. Not only does the AIM call out a different part number, but the LT-1 bracket has a much deeper step to it, while the LS6 is much flatter. The LS6 bracket is nearly impossible to find. I have been led to believe that there was an individual who did a VERY limited run of the LS6 brackets within the past decade or so. I think originals of each have the 7-digit part number stamped on them. (Different numbers, of course)

[Ron G.]

[Gary C.]

Re: 1971 LS-6 fuel line to carburetor bracket

Look at 70-72 TIM pg 130 Fig. M 15.1 and pg 133 Fig. M 15.10. The one from Ecklers is similar but not the same as the one shown in the two Figures in TIM. The one on 71 LS6 is wider after the tube clamp and has a bent up flange for stiffness and much flatter than the LT1.

[Gary C.]

Re: 1971 LS-6 fuel line to carburetor bracket

Also, the LS6 routing of tube goes above the vacuum source on carburetor base and LT1 goes below the vacuum source so the LT1 would be much deeper and closer to carb than LS6 which would be higher and further out so LT1 is not the right clamp.

[Mike E.]

Re: 1971 LS-6 fuel line to carburetor bracket

Pictures should help. The first two are of the LT-1 clamp. (repro, but other than the finish, pretty accurate). The second two are of the LS6 clamp.

[Gary B.]

Re: 1971 LS-6 fuel line to carburetor bracket

Low-mileage 71 LS6. Don't have a better picture.
Gary B

[Joe L.]

Re: 1971 LS-6 fuel line to carburetor bracket

All------


It's easy to understand why the LT-1 fuel line support differs from the LS-6. The LT-1 engine uses a "high rise" aluminum manifold whereas the LS-6 uses a "pancake" manifold. The LT-1 uses a carb fuel line with a "Y" block; the LS-6 uses a fuel line with a "T" block. The LT-1 mounts the fuel line support on the right rear carb stud; the LS-6 mounts the support on the right front carb stud. All of these factors combine to necessitate different configurations for the fuel line support.

However, I do not understand why the 1970 Chevelle LS-6 (and L-78) uses a different support than the 1971 Corvette LS-6. Both applications use the same "pancake" manifold. Both applications use the "T" block carb fuel line. Both applications mount the support on the right front carb stud. And, both applications use a configurationally identical Holley carb. So, why should there be any difference in the support bracket?

[Stanley S.]

Re: 1971 LS-6 fuel line to carburetor bracket

Thanks to all for your comments and excellent pictures. It looks like it is fabrication time. Is the finish on the bracket natural or possibly black phosphate? It is a little hard to tell from the photos.

Stan