Well, it appears I already have a 20:1. The wheel turns about 3.9 times before it completely stops. There's about a tenth of a turn on each end where you have to put a more effort in to get that last little bit. I'm not sure if that counts or not. Either way, I have at least a 3.75, with 5" of travel, so it wouldn't be worth it to buy another rack. It just doesn't make sense that it should be hard to steer. I'm just going to have to jack it up, check the caster and camber, and make sure everything is greased and operating freely.

I understand now about the steering arms. I just have the aftermarket single-piece forged spindles. I can't find anything where they define the steering arm length, and I don't see where different lengths are available. They all appear to be the same, geometry-wise.