Those are VERY early castings. You need to get them very clean and have them pressure tested.
Rockers will be expensive no matter whose name is on the box. I would not use Harland Sharp rockers.
Look around as used stuff comes up once in a while. FABO member may have brand new offset rocker shafts. Then you'll need stands. Once ou get those, you may be able to get some Norris stainless steel rockers. Even the MP rockers are fine.
