What is "Stipped?
Subflange? Make it, local machinest shop should be able to handle this easy.
Often standard header are easy and cheaply available while W-2 headers are often expensive race parts not to mention they often required 1 or more tubes over the frame or cut fenderwells.
You mean a W-2 gasket? MoPar has them, I have a set as well, they come in the MoPar gasket kit along with a verity of other gaskets you won't use.
You mean that fat ol Boss from the Dukes of Hazzard or a Chevy engine on a bike? LOL :snakeman: