ID BBC Exhaust Manifolds? Right Gasket?

[Contract_Pilot]

My Frankenstein Farm Truck.. 1993 C3500 with a Mid to Late 70's 454..

Exhaust Manifolds.. No Casting #'s

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Tried The Felpro MS90206 (No Go) The end Ports Seem to Be Off a Whole Lot? Anyone recommend the proper gasket for these manifolds?

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The Gaskets there were on it were blown out on the end corners also.

 

[Contract_Pilot]

Took a long trip to autoparts store found the right gaskets.. Tried a few and the MS95840 all ports lined up..

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[RichLo]

Glad we could help!