IMO this is affected by the tire. I've found the closer the tire shoulder is to a right angle, the more pronounced this is. I've heard the effect called nibble. A tire with a more rounded shoulder is less likely to exhibit nibble.
This is what I shot for on the 73 Dart. The chassis would only give my alignment guy +2ยบ. I took it. Combined with the front end re-build it has sharpened turn-in and raised steering effort considerably. At road speed the power steering is still light on feedback, but it goes where it's pointed NOW.
As for being a bugger to align, the A-body caster/camber is set by rotating eccentric washers at the front and rear of the UCA. It is possible to chase a setting from front to rear and vice versa. It can be frustrating. Most shops are used to being able to add/remove shims to get the job done. It is a more straightforward process.