Massey Ferguson 165

Japanese manufacturer safety recall affecting the power train. Declared production year: 2023.

Hey everyone, I’m working on getting a Massey Ferguson 165 MK1 back up and running after it’s been sitting in a shed for about 15 years. The water pump was leaking when it was parked, so I picked up a new one and started fitting it. The issue is the panel the water pump bolts onto (looks like the front plate of the engine, kind of like cast aluminium) was pretty corroded, and it ended up cracking while I was tightening the bolts. I’ve attached some pictures, does anyone know what this part is actually called? Also, how big of a job is it to replace? Am I looking at removing the whole front/timing cover, or is it a bit more straightforward than that? Any help or advice would be much appreciated, first time digging this deep into one of these. Thanks!