It all depends on wether it's worth it for you mate...
I'm about to start restoring my mk2 XR2. For the money it's gonna end up costing me I could just by a saph cossie or mint erst. But when it's all done and finished it will be my car and i can drive around in it knowing that i built it.
Hope you work out what you want to do with it.
Cheers
Stu.