Quote Originally Posted by Deuce View Post
From a engineering stand point ... the 4 bar is superior ... because of the 4 moving points verus only three for the hairpin. The 4 bar is a parallelogram. Caster is more consistent.
Can't disagree that the caster is more consistent, but I based my choice on my understanding of the history, which R&C compiled quite well some time back. http://www.rodandcustommagazine.com/...ils/index.html

As I understand it, the front links, panhard bar and steering link all form a system, and with a cross link steering box location the problems of bump steer are minimized. Given that a dropped axle front end only has maybe +3" of travel, and that the ideal caster is a range of 6-8 degrees for a road car, the change to caster is not as critical as it once was, especially if you are running radial tires. For me, the choice comes back to the look as much as the function, assuming that you have the steering question addressed. Mine's being assembled as a drilled I-beam, Vega style cross steering, and hairpins mounted through the frame rail, because that is the look that I like. I hope that I don't regret it.