So, I've found better pads than the Firm Feel Carbon Metallic pads....

All based on a Kelsey Hayes Single Piston Pin style caliper from a 1976 Cordoba

EBC Sells the following:

Red
Green
Yellow (their only track rated pad)
$120 ish for all.

Hawk Sells an HPS

HB643F.595 $60

Porterfield can get the following:

R4-S $89
R4 $219
R4-E Endurance Race pad $219
R41 Vintage auto-x pad $219

And they also offer Raybestos:

ST42
ST43
ST45
ST47

$229

For me, a set of pads can help me wait a little longer to convince Cas to make another LX Rotor on Viper Caliper kit...

Good news for the cheap guys out there who want to run factory style brakes really hard. I'm going to put Motul RBF600 or ATE fluid, add ducting and try to go kill the rotors at an HPDE!