The Wayne Due headers will fit the DSE frame, but the jury is still out on the AME frame with LS1s, but they are not correct for LS3 / LS7 / L92 which have a slightly different port location, and are deisigned for 1 7/8 or bigger tubes.
Looks like when all is said and done they will be unique to these 2 frames. Your bellhousing issue is being looked into, and will be one of the changes requiring a new part number.
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Frank Serafine
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