What camber caster gauge?
YOU DO NOT EVEN need a caster/ camber gauge..............Look at the post by grimreaper above You need a gauge (which you can buy nowadays) which will give you degrees tilt IE degrees off level. Make a bracket to accurately fit the wheels and figure out how to calibrate it level, not hard
CAMBER is read directly in degrees tilt with wheels straight ahead.
CASTER is figured mathematically by turning the wheels in (I'll have to look 20 degrees?) take a reading, turn them out 20, and take a reading
Subtract the two readings and multiply X 1.5 ---that is your CASTER
Camber caster gauges give you caster the same way.........the tool is simply a "slide rule" and does the math for you "in the gauge."
I bought one of these "angle cubes" to check the accuracy of my old Ammco caster/ camber gauge
digital angle cube at DuckDuckGo
Alignments are incredibly easy to do at home. I don't have a shop, so I load the car on my trailer, and level it up with blocks
You need turning plates which can be various things including greased/ salted sheet metal plates, etc
Some means of scribing the tires and a tape for toe
And your tilt/ caster/ camber gauge for "that."
Set ride height
Jounce the car to settle
argue argue argue and get caster / camber set
set the toe
recheck everything
drive and check