I think casting them would be even more work unless you were going to do thousands of them, but it would still be alot of time/work.
Here is a picture of the rear disc brake mock up. I did these before there were the really cool "kits" availibe. And 8 lug made it even harder.
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1970 4X4, Big block 454, 4 speed, vintage air, Mahagony wood bed, Tilt, tach.
Can have new owner for the right price.
"Life is tough, its tougher if you are stupid" (John Wayne)
My buddys truck for sale here.
http://67-72chevytrucks.com/vboard/c...p?product=2676