Please show us a couple of low pictures with the wheels what you think are straight forward. To me there is something wrong with the left whee as I look at it. I’m not worried about the steering wheel at this point.
To me as I see it the left wheel spindle (as you look at the pictures, right if you are on the sear) is bent down and forward. The right could also be, but not as much as the left.
The flat area where the drag link attaches to the wheel spindle on the left definitely looks to be bent lower than the right one. But the right one also looks bent also. This is one time when being there would definitely help.
Gets back to that discussion we were having in the oil filter thread,,,, Cheapness .
So you have 2 choices, buy the aftermarket ones that do have adjustments on them
or
bend the drag links to shorten the one that is too long
In reality you should straighten the one that is too short but that is a lot harder to do, not that bending a hardened shaft is easy in the first place .
There are other options... create adjustment of the current drags or straighten the spindles, which seems to me to be the real problem.
When the original part is expensive or not available, creativity is used.
Focusing on the cited parts and now with daylight, I could observe some things (with aligned sectorplate)
1 - In fact there is a difference in the size of the drags.
2 - There is a weld on the right side drag (seat).
3 - Matching the drags, there will still have to be a small correction in the spindles.
First I'll match the drags, then I'll check camber, caster, convergence (without the laser...).
Murray do not have a bush on the fabricated front cross member pivot
As such it will move in 2 arcs, one up & down & the other front to back
Because the cross member pivots in an arc, the fan gear needs to be able to do the same to some degree.
There are 2 bushes on the king pin that control the camber and caster is a non event as the slop in the cross mender negates any attempt to set it
This by the way is adjustable as the plate in front of the cross member has slots so you can tighten it .