throttle return spring bracket 302 4V auto

[shelbymann1970]

Does someone have a clear pic of the throttle return spring bracket? Also what is the finish? Thanks. Gary

[Corey Bowcutt]

Is this what you are referring to?  I will let the experts advise on the finish.

Corey

[shelbymann1970]

Is this what you are referring to?  I will let the experts advise on the finish.

Corey

yes, mine is bent differently but suspect it is just that-bent. disregard the spring.

[shelbydoug]

Now that's a bracket definitely "in the abstract". 

[shelbymann1970]

Now that's a bracket definitely "in the abstract". 

LOL. I got torches, I got vices, I got tools, I even have a blacksmith I can count on. Just need to make sure I have the correct angle before I go to work. Funny on what people do to make springs work.    Gary

[Coralsnake]

Spring changes with the transmission type

[shelbymann1970]

Spring changes with the transmission type

Thanks. It is an automatic GT350

[shelbymann1970]

Sometimes I look at NPD's catalog for "correct" parts so to speak. I know Scott who has done the catalog for decades and gets the parts for them and when I found incorrect stuff he was good at correcting it in the next catalog. They call the return spring for a 302 4V and 428Cj "concours correct" but there is no application for manual or auto designated so the assumption was just looking at the catalog is the same spring but am aware the catalog isn't the end all for concours correct especially since Pete says the springs are different. Their brackets they do not make a concours correct 68 302 4V. So I'm back to the angle for this bracket and also  what is the correct return spring? Thanks.  Gary

[Coralsnake]

The production 302 spring is not the same as the Cobra Jet cars. The service part maybe.

Original springs are green and they are not reproduced in the correct size as the oem spring. I have some references to a blue spring, which presumably is different but never seen a documented original.

[shelbymann1970]

The production 302 spring is not the same as the Cobra Jet cars. The service part maybe.

Original springs are green and they are not reproduced in the correct size as the oem spring. I have some references to a blue spring, which presumably is different but never seen a documented original.

Out of curiosity from a mechanical standpoint why wouldn't a Holley equipped 68 302 not use the same spring as a Holley equipped 428CJ? Basically the same carb physically and if they used the same return spring bracket why would the carb spring be different. I can understand how the hole placement on an autolite or 2V carb could vary warranting a diff spring but why 2 cars using the same dimensions from return bracket to carb hole on throttle? Were the brackets different on the intake?

[68gtcoupe]

The production 302 spring is not the same as the Cobra Jet cars. The service part maybe.

Original springs are green and they are not reproduced in the correct size as the oem spring. I have some references to a blue spring, which presumably is different but never seen a documented original.

The bracket pictured in the reply by Corey B. is IMHO the correct original bracket for a '68 J-code Mustang, Cougar or Shelby GT-350 with automatic and Autolite 4300 4V carburetor.  I removed one from the previously untouched '68 J-code 302 that went in my car and used it for a while before switching up the carb (among other things) and making other changes to the engine.  As for the spring, I have also seen reference to a light blue spring, I believe Bob Mannel's SBF book mentions it.  Unfortunately I did not snap a photo of what I believe was the original spring I used on my car prior to the engine being restored but I do recall a trace of what looked like light blue paint remaining. 

As others have mentioned, neither the bracket nor the spring are correctly reproduced at this time.     

Terry

[Coralsnake]

I guess you would have to ask the engineers why they choose a different spring. My information is based on what I have seen and researched. You stated the aftermarket parts catalog says they are the same, that is why posted my information.

I will post the measurements of the green spring this afternoon.

I agree with 68gtcoupe the brackets shown in the thread are correct .

[Corey Bowcutt]

I hope these dimensions help.  Let me know if you need more.

Corey

[shelbymann1970]

I hope these dimensions help.  Let me know if you need more.

Corey

perfect. Thanks! Gary

[shelbymann1970]

I guess you would have to ask the engineers why they choose a different spring. My information is based on what I have seen and researched. You stated the aftermarket parts catalog says they are the same, that is why posted my information.

I will post the measurements of the green spring this afternoon.

I agree with 68gtcoupe the brackets shown in the thread are correct .

I would appreciate the measurements Pete. To be clear I trust you 100 percent over any references posted in catalogs for parts. Do you know what the finish is on the bracket?  phosphate? Gary