'71 Road Runner Fender to Cowl Brace

• Aug 27, 2025

• #1

ct71rr

Chad

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Hello all, does anyone happen to know what bolt is used to attach the fender to cowl brace to the cowl? Is it a self-tapper or bolt and nut or something else? It's the bolt circled in red.

This is the brace:

This is the bolt:

 

• Aug 27, 2025

• #2

70chall440

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I believe they are 5/16-18 dog point with captured washer (aka 5/16 body bolts). You can usually find them in the help section

Amazon.com: (25) 5/16 18 x 1 3/16" Body Bolts 1/2" Hex 7/8" Washer : Industrial & Scientific

 

• Sep 3, 2025

• #3

ct71rr

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Hello all, for future reference: I was able to figure this out with the help of a seller on Ebay. There are welded square nuts (1/4" -20) that are supposed to be on the inside of the firewall. Since I replaced my firewall with AMD's, also correct for E Bodies, it did not have these nuts (and hole drilled) installed. The attachments to the fenders use a clip nut and the same 1/4" - 20 bolt as the firewall bolts.

 

• Saturday at 8:28 AM

• #4

ct71rr

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Not the best pics of the mounts but I thought I’d post them for reference in case anyone else needed them:

View from inside firewall - passenger’s side:

Passenger’s side - outside of firewall:

The driver’s side is pretty much the same.

 

• Monday at 12:12 PM

• #5

71Beeper

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Chad, if I'm not mistaken aren't those welded square nuts for this?

 

• Monday at 12:17 PM

• #6

ct71rr

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Yes, they are. My terrible pics are trying to show them. They weren’t on the AMD panel I bought.

 

• Monday at 5:07 PM

• #7

ct71rr

Chad

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I pirated some better pics off of the Nest from sdweatherman’s build. Welded-in nuts circled in red. These were not installed in the AMD firewall panel. I guessing because the panel is an E-body panel but does fit our b-bodies (mostly). I totally forgot to weld them in to my car - oops!

Driver’s side:

Driver’s side inside view:

Passenger’s side:

I hope this helps someone in the future when they use the AMD panel.