I've seen a few done however most people are going to say swap for later knuckles with V6 mini truck front calipers and later short, fine spline birfs. If you're going to wheel it, especially if you lock the front, then I'd say go with the toyota stuff.
Will those brackets and GM calipers work? Yes. I'd suggest 2 3/4" piston dirt track calipers for the front and normal GMs for the rear.