Original Corvette 1958-1963 Exhaust Manifold GM 3750556 283 327 Ram OEM SBC Passenger Side.
RH 4 
K12 4 Date Code

This Has had a weld repair for one of the studs.
Welded with Cast Iron TIG rod and threads chased.
Did a quick Glass Bead to clean up. All Threads been chased and good.
Feel Free to ask Questions and See Pics.