I tried to install my 629 Mtn Gun cylinder in two of my 329s. Tried the entire 629 assembly (yoke/cyl) and just the 629 cyl w/329 yoke/crane. IIRC (it's been a long time) I couldn't even close the cylinder. Was just curious, and didn't want to force anything, so I didn't pursue it. In theory, I would think it should work - probably require some fitting.

FWIW,

Paul