Good Site for Specs on Mustang II/Pinto Coil springs

[acr]

Check out www.coolparts.com for a list of specs on Moog coil front end springs. You can search by part number or year, make & model. Here are the part numbers for M-II I have found; 8542, 8556, 8558 & 8552. They list; free length, bar diameter, spring rate, load rate, etc.
BTW, Moog makes many part house coil springs. In my area AutoZone had the best price, same part number & box as Moog.  );b(