Improved Handling

You seem to be the guy that would know. I plan to use the offset bushings. If I can get that much, can I get away with 3-4 degrees on the street, or should I maybe use a bit less? I've got an original 16:1 manual box I plan to put on my car, and plan to run about a 215 to 225/60 15 radial front tire. The car has a small block.

With manual 16:1 steering it will be harder to turn at low speeds 5mph to 20mph with the more caster you run. Maybe start out with 1-2 degrees postive caster then see if how hard it is to turn. If fine try 3-4.

It's total personal perference. It's hard to say what YOU think to too hard of steering at low speeds. BTW if you run an aftermarket small diameter steering wheel that will make it harder steering too.