318 2bbl manifold swap with OE cam - worth it?

I would upgrade the cam for sure I put a 4bbl on a 318 once wih duals it helped some but was still not much more then the 2bbl the duals helped more. The last 318 I did in the dart I have I changed the cam too, a huge difference revs all the way to 6 K now and I get better millage too. You can easily get 100 more hp out of it over stock with bolt ons but you need more cam. I am using the stock 340 cam but there are alot of newer disigns that are way better. Your probably leaving 50 hp on the table with that little cam.