I always consider caster to be similar to trail on a bike fork. Increasing the caster (or trail) reduces the car's immediacy of response to any change in direction from a steering input.
So increased caster will 'numb' the initial steering response into the corner but will make the car not want to straighten up when coming out of the corner.
Reduced caster will do the opposite - it will make the car feel more immediate to any given steering input - so it will feel twitchier on the way into a corner but will release the turn earlier when you straighten up.
As for kick angle, please click
here - straight from the horses mouth as it were. Not that I'm referring to Todd as a horse you understand
Whilst this was obviously written for the 22 and 22T, obviously physics and dynamics are universal and thus it would equally apply to other cars.
HTH