Exhausting day at the Y

That's a pretty interesting driver's side manifold. I wonder what size it is? I have a set from an '88 Gran Fury, but the drivers side dropped down instead of upswept. I wanted to use them on my Duster cause they were a lot larger than the stock 318 manifolds I had. Unfortunately the drivers side wouldn't fit with the PS gearbox.
I am with '74 Swinger on this, probably a lot less hassle and all to get a good exhaust shop fab it up.
C