Too big of cam?

As stated by Charrlie. If the engine is really a Aluminum engine then you need to be careful. On an aluminum engine I would just upgrade to EI or HEI ignition, Super six (2bbl carb, manifold and 2 1/4 inch exhaust) and recurve the distributor. When that is done then lets see where you are at. If its an iron engine then we will talk.
Frank