I recently aquired this assembly I tried to
post pic of it but its not working.

There is 2 braces on the assembly.
Is this where the clutch master cylinder mounts
with the ubolt?

 

yes. I am currently swapping a TKO 600 into my IROC which had an automatic so i just did this. bolt the pedal assy to the brake master cylinder using the 4 nuts (yes they are a pain to get to arent they!) then with the 2 braces in place drill thru the floor of the car. make sure the holes are close enough together for the U-bolt to go through. once you have the holes drilled, you will have to cut a hole in the firewall for the actual clutch master cylinder to go through. I used my gasket that goes between the firewall and clutch master cylinder as a template for this.

 

Drill threw the floor of the car?
You meant the firewall right for the 2 holes.
So then if I get the gasket for the clutch master cylinder
I can easily drill the holes correctly that simplifies it.
Just have to line up the braces correctly.