After sandblasting, planing, painting (Rustoleum High Heat Silver), & new flange hardware (cheapo aftermarket because there were no others at the time); I applied red silicone & installed the manifolds. This one is significantly warped - the front port is noticeably higher on the head than the other 3, which necessitated torching its top to make it bend down so I could install the last bolt (388469-S).
None of the bolts have been torqued in this pic; they're all very loose, except the center one in the small hole is barely snug.