Maximum Performance N/A 383 build. Input wanted from engine gurus.

Well that's up to you, if you want to trust those rods, arp will be your best option for bolts.
Have to be mindful of torque specs though as more torque on the bolts will require a little resizing the rod.
If you were to change to main studs you would need the block line honed also.
Since it's put together run it like that but you will want to be mindful of excessive cap walk

I have the same idea myself in building a stock stroke (400) but same principle, just make something radical that isn't the norm nowadays with all the kits available
Yeah I was really intrigued when I read in a old Mopar book from the 70's about a build pretty similar to what I am trying to accomplish, but it had no information on head flow data, valvetrain, or any of the voodoo. Back then they ran a .654 DC Mini Express mushroom cam.

I initially was going to run a RB STX-22 (320 duration .590/.590 lift) but I realized I mistakenly bought a Hemi cam core, and I would have been leaving power on the table if I spent $600+ on getting the same spec cam ground for a B/RB