If you mount a good used replacement muffler properly and make absolutely sure there is no strain on it. Using the original mounts it will last. It should sit in the place it belongs without any bolts and no spaces between it and the block. If it has to be pulled into place it WILL break. Another one of those things I have had to repair too often.Thank you very much for the replies! I will definitely purchase the tractor once some of the snow is gone (assuming that it's still available which it should be)!
I have mechanically restored my 318 for a far worse condition 4 years ago so hopefully, I will be able to repair the 430 as well. My John Deere 318 Story and Problems (Lots of Pics)
I should be able to make the necessary adapters to mount a different muffler onto the machine (assuming I can find a muffler that will fit between the frame and the oil pan).
It also appears that the battery tray form 314, 316, 317 and 318 will fit into the 430, but if I can't find one I will simply make it.
Form my research, the TDM modules interchange between all open frame 300 and 400 series tractors, but I found them with two types of connectors (early and late version?). Please correct me if I am wrong.
Where is the glowplug module located on the 430? I am not sure if this one still has it since like I said earlier, the electrical system has been messed with.
Module is on the firewall just behind the injection pump.
420 parts will also fit for a lot of things. Beware of VIN's beacuse there can be substantial differences in same model different VIN. Front wheels / bearings / axles and hydro control lever linkage are prime examples.