A little positive caster isn’t gonna do that. It’s true, the more positive caster you run the more you camber the tires when turning so you do get some lifting which increases turning effort. But I run 275/35/18’s up front with a 16:1 manual box and +6.5* of caster. Sure there’s more steering effort but it’s not a huge increase right at the end of the steering range. And my set up is pretty extreme, so I really doubt it’s a caster issue. Especially if he isn’t running adjustable tubular UCA’s, you just can’t get enough caster for that to be the problem.
It’s also super easy to eliminate, because with the tires off the ground it wouldn’t happen.
