I'm finally at a stage in life where I can start buying parts for a new build. 10 years ago I bought a nice 400 block and didn't make any progress since. I've got a good idea of what I'm after but still need help with a few parts of the build.

The car:
70 Super Bee (pro street)
383 (needs a new cam)
750 dom
Team g intake
906 heads
MSD Ignition
Dana 60 4:88
6 point cage
Ladder bar rear
SMR 727
MT Sportsman Pro 33"x21.5"x15"

This is a street car that I bought built this way. I've only ever been to the track 3 times in 10 years. It ran a best of 12.97 @ 108 with 2.12 60'
Obviously the engine and TC aren't well matched. The engine works well above 4000 rpm but down low its sluggish. The car made 380hp and 390tq on a chassis dyno.

What I have in mind as my handle suggest is a 500ci low deck. I'll use what I can from the 383. I didn't have a specific hp goal in mind but I would like to build the strongest street engine that I can while keeping the rpm under 6000-6200. So far I've decided on:

440 source 512 kit
TF240 heads
TF Intake

Where I need help is the:
Cam
Valve train
Carb