The Howard head could use all the stock stuff including the cam. The Horning/Fisher was the only one I knew of which moved the valve arrangment.
All the Howards I've seen have injectors and could use the same ones as the Wayne. The picture of the Webers look great but I know of no manifolds for it. Howards son Don may know; he works at Chet Herberts shop in California. I assume the Howard could use all of the Wayne GMC manifolds but the 45 degree angle may mess this up.
The Chevrolet Wayne used the 45 degree angle also so it's a possibility something from one of those could be made to fit but it wouldn't be easy. Webers are "modern" so who knows how this was done. Good Luck
