one thing i did notice is that you do not have the support plate on the inner frame rail. there is a "angle plate" that fits right at the mounting holes to the frame on the bottom 3 and the side 2 bolts. this gave a big boost to front end structure.
for the lower arms, i would check bracket s from the 73-80 style and see if there was a change. there are numerous "subtle" changes in the 73-80 and the 81-87 trucks.
that powder coating looks sweeeet!!
