On 8/13/2020 at 3:31 PM, red67 said:

Any Idea what the thread size is for those three front  lower radiator support captured nuts?

M8? you have a picture

 The three captured nuts, on the bottom of the lower radiator support, that the splash shield would attach to. 

  On 8/14/2020 at 12:28 PM, red67 said:

 The three captured nuts, on the bottom of the lower radiator support, that the splash shield would attach to. 

M8 x 1.25

Correction edit: I have checked, and I have found mine (three cars: 1970 x 2 and 1972 x 1) to be M5 x 0.8. 

Edited August 16, 20204 yr by HS30-H
Correction

 The three captured nuts, on the bottom of the lower radiator support, that the splash shield would attach to. Got ‘em M5-.08

Ah you mean the splash pan ? M5 could be yes. I thought you meant the radiator

My ‘73 has it.  I’m certain they were stock.

  On 8/15/2020 at 12:38 AM, red67 said:

 The three captured nuts, on the bottom of the lower radiator support, that the splash shield would attach to. Got ‘em M5-.08

I just checked on my cars, and I agree. Smaller than I expected.

 

The reason for the original question. This  is what I bolted to those three captured nuts. Probably should’ve started a new thread, but since it started here, I’ll let you guys see it first. Not a fan of any of the currently available front spoilers. IMHO, they ruin the Ferrari-type look. Wanted something subtle but functional, so I had this made up. Gauging interest?