Thanks guys!
The Jegs link leading to SPC is great (as is all other input)! This is the FFR upper arm which I have.
I have a solution for the rear using my own upright and connect via rose jointed arms.
Similar to what I saw on Mclarens (CanAm).
Or like this:
1967-1969, 1970-1973 Camaro IRS Independent Rear Suspension Kit & Parts - HEIDTS
For the front, Mustang 2 looks good as the measurements are quite similar to 427 control arms. Which needs to be confirmed. I need to find the upright measurements including steering arm position.
Mustang II HEIDTS Front Suspension Kit & Mustang 2 IFS Parts - HEIDTS