you got a hell of a deal - that John Baker cam was designed for these trucks back in the day, and will accept weber carbs, headers and exhaust mods with great results. You just went from fixing the motor to making a major improvement in one shot. The cam was also known as a Mikuni Muscle cam, ground by Mikuni for John Baker when he raced these trucks off road. That cam could be bought from John Baker separate or with the complete head. Let us know how it runs after you get it back together. Does the other head he had have the same cam in it?