Exhaust Redo - 440

I need some help and suggestions as I am finally getting around to the exhaust side of my project

The headers will stay on the motor (440), but I want to gut and replace everything after the headers (unknown brand)

Looks like I have a 2 bolt style headers flange style connection

The angle of the flange connection is my first concern. Do they sell a 2 bolt angled flange or a flexible flange connection?

The current setup is bad.....rigged with 2-1/4" pipe, two cherry bombs and turn downs before the axle

I am hoping to find all bolt on parts and do the exhaust myself

First I need to figure out the header flange connectors and then decide an exhaust pipe size......2-1/2" or 3"???