concur with 'caster' - for a front end that will see street time it pretty much all comes down to caster angle. Generally speaking, if you can set up your front end so the caster is ~6* you'll typically have a decent ride that tracks well. Altering the C's offers more caster options but can also induce other issues. Set up the mounts to accommodate your desired caster angle, and glue it together. Longer length leafs tend to ride/flex better without sacrifice in weight capacity.