Rally preparation.

[Quick flick]

I have a mk1 that I'm wanting to do some historic navigation events, and possibly in the future stage events. The car is a bog standard 850, which I plan to build a 1293cc for. I'm looking for inspiration as to specs of car. Everything from interiors, outside, engine, suspension, brakes etc. I already have the 7.5 S brakes fitted so they will stay with some decent pads, it's running dry suspension so adjustables and hi-los will be fitted also.
Any help, pics, etc will be great.
Thankyou.