408w swap: Trying to ID these headers

Picked up a Stroker recently in a private sale. The seller couldn’t remember exactly but thought the headers may be hookers. I’ve searched everywhere and can’t confirm. Hoping someone here may know. They could be 5-8 yrs old based on some other parts receipts from the build. TIA
 
Yes, they’re coated inside. And does not really matter at the end of the day but knowing may help with planning k-member and cowl. I’d like the smallest cowl I can get away with (2”) and read in a recent post that some headers (MAC I think) don’t fit with aftermarket k-members. Just trying to minimize downtime once starting the swap is all. Thanks