"stamp rite" fuel line support bracket for 1970-71 LT1

[Tom S.]

Does anyone know what is the correct fuel line support bracket for the 1970-71 Corvette LT1 with the Holley carb? This is the support that holds the short steel fuel line that runs between the rear fuel bowl on the Holley carb and the brass "Y" block on the fuel line. It attaches to the rear carb stud on the passenger side of the carb. Original GM part # 3959444. I have been told that an "original" support bracket has the "stamp rite" logo embossed on it. Is that correct? I know that they do make a reproduction for this part, but it does not have the stamp rite logo. I am trying to get my early 1971 LT1 as NCRS correct as possible. Please share your thoughts to me about this topic. Also, if anyone has an original support bracket wit the "stamp rite" logo embossed on it, I would be interested in buying it if possible. Thanks, Tom

[Dave S.]

Re: "stamp rite" fuel line support bracket for 1970-71 LT1

Tom,
Both my 70 and 71 LT-1's had that same bracket with the Stamp Rite stamp. I'm sure that is the correct factory bracket. In all my years I have only seen one for sale and I bought it for $10 at Carlisle. It was passed on to a friend who had a perfect car for it. Never say never but that support is a rare piece.

[Ron G.]

[Dave S.]

Re: "stamp rite" fuel line support bracket for 1970-71 LT1

The Stamp Rite stamping is debossed. It is my understanding that the LS-6 bracket differs from the LT-1 bracket. Not sure the exact differences but a frequent poster on this board will be able to explain.

[Ron G.]

[Ron G.]

[Ron G.]

[Joe L.]

Re: "stamp rite" fuel line support bracket for 1970-71 LT1

Dave,

After looking at the judging manual, on page 157 last paragraph, it says that on LT-1’s the bracket is natural which we already know, but the bracket on LS-6’s are black phosphate. I do not believe that the configuration is different. It’s my opinion that the configuration is the same.

Ron-------


The fuel line brackets for 1971 LT-1 and LS-6 were different although somewhat similar. There were at least two reasons for this. First, the fuel block and fuel lines were different for LT-1 and LS-6. The LT-1 used a "Y" block whereas the LS-6 used a "T" block. However, the biggest difference involves the fact that the LT-1 carb was positioned much higher on the manifold than that for the LS-6 as the LT-1 manifold was "high rise" whereas the LS-6 manifold was "pancake". So, this creates the need for the LT-1 bracket with a greater off-set or "drop" from carb stud to fuel line.

The LT-1 bracket, GM #3959444, was used for all 1970-72 Corvette LT-1. I believe it was also used for 1969-72 Z-28. As far as Corvettes go, the LS-6 bracket, GM #3994043, was used only for 1971 Corvette. However, it may also have been used for 1970-72 Chevelle and Camaro with LS-6 and L-78. The GM #3959444 was discontinued without supersession in 1980 and the GM #3994043 was discontinued without supersession in 1977.

[Patrick B.]

Re: "stamp rite" fuel line support bracket for 1970-71 LT1

My 70 LT-1 had the bracket in your photo, but it could not be used on a LS-6 because the LS-6 manifold is flat for hood clearance rather than a high rise design like the LT-1. The LS-6 could not even use the same kind of fuel lines to the carb bowls. MF Dobbins 1968-1972 Fact Book has some photos of these engines. There is a photo of a 70 ZR-1 with this bracket attached to the rear carb stud holding the fuel line to the rear bowl. There is a similar picture of a 72 LT-1 with this bracket. Oddly, his 70 and 71 regular LT-1 examples do not have the bracket, suggesting it was one of those parts that got discarded early in a Corvette's existence.

He also has pictures of a LS-6 and a ZR-2 showing a similar bracket attached to the FRONT carb stud holding the fuel line to the REAR float bowl. The bracket is similar but it must be bent differently because the fuel lines are not as far below the plane of the carb base as in the case of the LT-1. The fuel line to the front float bowl looks like the short line to the forward carb on a 69 tripower, and the rear line goes from the same kind of Weatherhead tee fitting used with tripower all the way back to the rear bowl. The support bracket attaches the rear line near the weatherhead fitting to the front carb stud, supporting the fitting and the line to the fuel pump.

[Dave S.]

Re: "stamp rite" fuel line support bracket for 1970-71 LT1

Ron,
Hopefully Rev. Mike will jump in. He is the one who educated me on the LT-1 and LS-6 brackets.

[Ron G.]

Re: "stamp rite" fuel line support bracket for 1970-71 LT1

Dave - Yes, hopefully Mike will participate in this thread. Joe, many thanks for the info. Although I have looked and judged many Corvettes, it is not everyday you get to look at an LS-6.

[Dave S.]

Re: "stamp rite" fuel line support bracket for 1970-71 LT1

Here is the bracket on the 70 LT-1

[Sal C.]

Re: "stamp rite" fuel line support bracket for 1970-71 LT1

The last one I saw for sale was with fuel lines and block for $600.00. Sold quickly.

[Tom S.]

Re: "stamp rite" fuel line support bracket for 1970-71 LT1

I realize that the stamp rite support bracket is hard to find, but I would be willing to pay the premium for it if anyone has one that they want to part with. Thanks, Tom

[Mike E.]

Re: "stamp rite" fuel line support bracket for 1970-71 LT1

The LS6 bracket is actually totally different. There was a thread on that within the last year or so. (Actually, early February 2018).

Tom,

I don’t believe the “Stamp Rite” stamping is embossed, but it is indented into the bracket. I know you indicated your car is an LT-1, but Just an
FYI, LS-6 cars have that same bracket attached to the right front stud.

- Ron