Please critique my home front-end alignment method

MOPAROFFICIAL said

Instructions are really vague.
the car has to be level for the readings to be any good. Wheels off and at ride height imo

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I have a Longacre of that type. You don't put it on the rotor surface. (Crazy "pals" in China!) You take the dust cap off (temporarily snug the bearings to remove any wiggle), and attach it to the center of the drum/rotor. Leave the tires on it (inflate all 4 correctly). If you have aluminum rotors (Wilwood, etc.), Longacre sells an adapter that screws onto the spindle.
For toe, I used to use a 2 x 4 with some bent up shelf brackets. But now I use the cheap toe plates sold on ebay or Amazon. Much better.
Also, I use (2) 12" square vinyl floor tiles under each tire with sand between them as turn plates. Don't use the self-adhesive kind- the backing makes a mess.
https://www.youtube.com/results?search_query=using+longacre+caster+camber+gauge
Don't be afraid to check and set as much as you want. You'll develop a "feel" for what it wants.