have you ever seen a TIICO conversion kit for a vanagon? some of them have a really nice two into one exhaust that would be great for that setup you have. I may even be able to hook you up with one. The manifold is from an Audi 80, late 80's 2.0 gas bubble block
Nice looking rig. GL w/ the sale. Try posting on thesamba for larger T3 interest base.