I'm working with a friend of mine to make aluminum brackets to basically do what was done in that thread on ROP.
My goal is to make them an absolute bolt-on affair so that there is very little fabrication involved. You'd basically need to source the Ford 302 crank pulley and have it drilled out to the Olds bolt pattern. From the one I have, the Ford pattern is not too far off from the Olds pattern.
You will also need the reverse rotation water pump from a 4.3L V6 Olds diesel.
For the P/S pump pulley you can buy a brand new one from Autozone for a '95 4.3L S-10/Sonoma.
The brackets are best sourced from and early to mid-90's GM pickup with a 4.3L/305/350.
What's nice about this setup is that all of the accessories get placed out in front of the engine so if your running tall valve covers, you don't have to worry about anything hitting.
These are the preliminary brackets I had made up but they are going to have to change. I was mocking these up with just the heads and not an actual engine so I need to change the locations of a few bolt holes.