Yes. the only difference between the 440s and the 383 is the head pipe sizing I think. I know the tail pipe sections were all 2 1/4 for the big blocks.
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By the way...... any exhaust system that you get, make sure it HAS weap holes in the mufflers. Don't ask me how I know as a certain company that I got a complete kit from for my charger (and it wasn't ECS exhaust as they were not making them yet) did not have the holes punched in the mufflers to let the condensation drain out. When I realized they were supposed to be in there, I took an awl and punched them in there and had easily a pint of rusty brown water come out and into a catch can. Pretty sure that ruined my muffler as they developed a rattle inside it. I finally replaced them last year with the ECS penta start and dated coded mufflers and had to bend the head pipes in order to get them to fit. Apparently, the company who made the complete system for my car was not all that accurate compared to what a factory exhaust should be bent like.