Until this last post, I honestly didn't realize you had an efi setup on the car. I thought you were thinking of going efi, and planning on changing the cam to do it.
What system do you have on the car? With that info, I'm sure you can be guided to get the engine running more as you desire.(assuming the system has the capabilities) As stated previously, some systems are limited, and you may need to make a choice between changing the cam, or ecu, depending on what you have.