Should be an easy repair for just about any good muffler shop. also re. the 49 manifolds, have one on my 46 high torque motor only difference is that 49 exhaust flange doesn't point straight down but angled back.

It's easier to get forgiveness than permission!
1946 1/2-Ton Chevy
1953 Chevy 3/4-ton Factory Stakebed