It's the same size and should fit just fine. (don't use the fan guards /grilles)
Overall the specs are a little different than the Globe motor/ fan that Mesa currently uses. (Fwiw they used Howard fans in earlier Mark series amps - I, II, and III’s)
It'll be a little bit louder but overall still a pretty low dB so it shouldn't be all that noticeable.
The specs of that fan are in the top table below.
The specs for the Globe motor/ fan are in the bottom table.