1971 Demon Strange steering problem

are you sure you didn't just need to jounce it bounce it and run it back and forth a few times between each adjustment.
if the tyres can't move In out or left and right as you make the big changes that you need to make as you set it up into good ballpark before you start your tacking and alignment everything is all over the place and you just fight friction between tyre and floor.
this is usually to do with wildy wrong toe in/out
roll a car back and forth in this state and you get the same symptoms
1 tyre patch rolled 1 way the other fighting it, wheels splayed front of car rises or lowers as you move back and forth.

it needs to be a ride height first, then it needs to be ball park driveable and going straight before you start with the alignment guages and messing with camber and castor.

if you put back the standard less adjustabe stuff and it now works the standard setup and the toe in or out you ended up with may well have just been closer to correct.

there may have been nothing wrong with the aftermarket set up you had...just you had not moved the car enough when setting it up. when you thought it was right your tyre contact patch was twisted and fighting your last adjustment


[AH already been said......] I'll read everything next time :)
Dave