Couple of things. Most of the companies use the stock GM style disc brake hoses. Problem is, on disc brake trucks, the lines connect on the front of the crossmember. On drum brake trucks, the lines are on the rear of the crossmember. This actually make the disc brake hoses route incorrectly. Most just deal with it. On my panel, I made new lines on the front side with bracket that replicate a stock disc setup.
Not the clearest pic but you'll get the idea,
Also, the bolts holding in your upper ball joint are not mounted correct. The nuts should be on the top of the arm. Doesn't make sense at first but with the excess bolt threads sticking down, you run the risk of having them tear into the boot.
This shows them,
Otherwise, nice job.