MGTD project comes in the shop, we take a first look

We get an MGTD in the shop that you could basically call a stalled restoration. 15 yrs after the project was started the owner decided it was time to enlist our help to finish it. There’s boxes of parts to go with what was described to us as an 85% done car. After that amount of time, what will have to be redone or replaced, and is the rebuilt (15yrs ago) yet unfired engine ok or will it have to come out?