Mickey Thompson Header Find - need ID

[scuncio]

Hi folks, scored a near NOS set of SBC Super Scavenger headers with one of the two collectors still there and an old muffler from Grand Automotive. The headers have definitely been bolted to an engine but I don't believe they have ever been run.

I can only find a 'D' and '8' stamped on the header flanges. Any idea what these may fit? Super Scavenger applications are pretty light - '55-57 Chevy, early Camaro, early Chevelle, early full-size, Corvette...and I think that just about rounds out the SBC applications.

Thanks in advance,
Tony