I thought about doing something similar with my TS when it stopped being my daily drive. I was also offered a lancia 8.32 engine as well though so had the slightly bonkers idea of mating that to integrale running gear in the GTV body.
My intention was not to get a well balanced performance car though, just fancied a 4wd, Ferrari engined pininfarina coupe.
In the end decided I need a better donor vehicle through as my phase 1 TS had very little worth keeping.
Will be interested to see how this pans out though.