I have a very similar combo to yours, so I ran some dyno desktops for you out of curosity.
Run #1 is your existing combo with the melling cam
Run #2 is with the new ultradyne cam
Run #3 is with a single plane intake & 850cfm carb
along with the ultradyne cam.
I have an airflow file for unported #62's so I used that. I also gave you small tube open headers
The numbers aren't important; the trends are.
I hope this helps.
Edit: The third run on the graph says "melling". I misnamed the file; it's actually the ultradyne cam.