WICruiser,
I think that these (see link) are what HRL may be referring to.
https://www.dormanproducts.com/gsearch.aspx?year=1984&make=Chevrolet&model=C10&origin=YMM&parttype=Exhaust%2520Manifold (copy and paste to browser)
In comparing these manifold photos with your previously posted "trial cab fit" install pictures showing engine location, these might be just what the doctor ordered.
Let us know how things turn out.
Dan
Last edited by Gdads51; 08/02/2022 2:24 PM.