Well an MOT failure last year has lead me along to the stage where my 1988 110 County is awaiting a new galvanised chassis from Richards and a new galvanised bulkhead which is being painted this week, so...

Given the wealth of knowledge on the forum what would be the things you suggest I think about now rather than in 6 months time when it'll all be back together (hopefully!) and much more difficult to do?

While you have it in bits, check the loom.