Bracket engine, what would you build and why?

Thanks again for all the replies, keep them coming!
No Chebby in my mopar ever, can't see starting with a inferior engine.
I know there are sooo many variables to consider when you're off a few on the big end, but I figure [usually gets me in trouble lol] that the best time to consider everything you can is when building. Agree on the no radical ramps, can anyone suggest someone to spec. a cam for me that understands the difference between a bracket engine and one built to make the most power possible.
I may be wrong but I think with the old engine going through the traps around 6,500 with very close to stock 452's the engine was past peak power and that could contribute to the inconsistencies in the last 320. I video taped my tach, around 5,100 at the hit, shift 56-59,000.
Thinking better heads and less gear to have engine making good power in the last 320?

Flyfish
Awesome looking car, love that body. What does it weigh?