The shops local to metro-Detroit carry PF-Z pads at Autozone. I used these on my stock brakes for a few years. Got new warranty pads every spring

Hawk HPS pads I hear are good too. Never used them myself.
I think between the two is like arguing between Mobil-1 and Syntec synthetic oils. Both are great, just pick a brand...
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Darius Rudis
Roadracer: Home built t-arm/panhard suspension powered by an S-trimmed motor :-)
My Mustang Page