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You need to take it to a heavy truck shop - only they have to tools to bend the beams as needed. There is a very good one in Fresno, but you should be able to find one closer to home.
You can set the toe-in yourself, and do as good a job as most shops.
There used to be a place where Coffee ran into Scenic, called Scenic Wheel and Brake...it's gone now, but I'm pretty sure when they moved, they either kept the same name, or mentioned "formerly Scenic Wheel and Brake", they used to do my staright axle trucks way back in the day.
If no luck fnding them now, call Neville Brothers, Larry used to be into 40's and 50's Chevy PU's, and could probably steer you (pun intended) in the right direction.