new member and new to me 77 nova

[77nova350]

Hey all, my name is Bobby and ive recently picked up a 90% restored 77 nova with a 69 camaro swap: 350ci with a th350 trans, holley 450, unknown cam, and stock heads. 2200 on the motor and 75k on the trans. My question is, where do i begin my build? Im shooting for 400 without the bottle, 500ish on the bottle. I would "like" to keep my stock heads if possible. At my current setup, whats a nice cam, intake manifold, and carb to get? (As a starting point). From that point on, what else am i looking at to push those numbers? Any and all help is much appreciated. Thanks in advance.

*i should probably add that im piecing together a parts list to throw in a 400 crank*

 

[zora]

1. Intake Edelbrock RPM Air Gap
2. What heads do you have, if not high performance you wont reach your numbers.
3. What is the list# of the Holley, it's located on the front of the choke air horn, something like 80234, etc.
4. The cam is key along with the heads, but need to know what the rear end ratio is and if you are willing to change it if necessary.