Steven,
ERA specs, from their downloadable manual
Front
Caster: +6 degrees +/- 1/2 deg. (The right side caster should always exceed the left, if there is a variation)
Camber: 0 degrees +/- 1/4 deg.
Toe-in: 1/8" +/- 1/32"
King pin inclination: 7 1/4 deg.+/- 1/2 deg.(not adjustable)
Rear
Inclination of the hub carrier toward the rear: 7 1/2 deg.(corrects bump steer)
Camber: - 1 deg., +/- 1/8 deg.
Toe-in: 3/32" +/- 1/32"
Mark V (local Seattle car)
Front
caster +2-1/2 deg
camber -1/2 deg
total toe in 1/16"
Rear
caster +5 deg
camber -1/2 deg
total toe in 1/8"
but with corvette suspension your settings might be different, you might want to go with the vette settings in the front.
What year vette susp are you using on your KVA? Are you using an adapter on the rear vette upright to convert it to 4/5 link? If so I don't know what settings you would use. Maybe some of the Englanders could tell you.