Depending on machine, some can measure wheelbase differences. But mostly the concern is the angles.

Note that I've been trying to emphasize that thrust angle can be off no matter what rear suspension design you have. If it's a 71 Charger, you shim a spring hanger. If it's a Camry, you fiddle with toe adjusters. In either case you want the wheels parallel to the vehicle centerline.

I'm not sure where anyone got the idea that I suggested that a straight axle has individually adjusted toe. Sure, some fwd cars had bolt on spindles that could be shimmed but that's unusual.