I had a similar problem with the axles on my car, that came from John's 9 inch Factory. The axles and rear housing were supplied by the Oze Rod Shop, where I bought my roller. The rear axles faces both had at least .015 inch of runout and of course the runout on the brake disc was much larger. I could tell from looking at the end of the axles that they had been rusty old axles from a salvage yard, sand blasted, shortened and resplined. No offer from Oze to replace the axles.
I junked those axles and bought some Currie cut to fit axles from Speedway. The came with newer SET20 bearings that eliminate the inner seal and use the gear lube for lubricant, rather than being a sealed bearing.
From your pictures, you have rear springs that are of the old variety, with small spacing between the coils. Newer models, like those sold by Ride Tech are not wound so tight and have less chance of binding up. On a car like yours, the spring rate should be quite low in the rear, perhaps as low as 150 lbs/inch. Ride tech has a spring rate calculator.
http://www.ridetech.com/tech/spring-rate-calculator/