I may be wrong but I don't think 304's in CJ's came with 2150's, they were all 2100's. Waggy and J-truck 360 had the 2150's.
Either way they are the same carb base, and essentially the same carb anyway so the mounting is no different.
There were two different mounting methods depending on the year. Don't remember the cut off date, but it was mid 70's. The first one went manifold, thin gasket, metal spacer, thin gasket, carb. The later ones went manifold, thin gasket, plastic spacer, thick multi layered paper gasket, carb. Team wagoner sells everything needed for the later method.
Under A Sun Thats See It All Before...