Just seen this, sorry, but just in case it's interesting...
Dolly-Nut owns the Toledo Sprint stage rally car that I originally built about - erm - 16 years ago. He or a previous owner (I cant remember now) posted a couple of pics of the car which I cheekily saved as I didn't have any digital pics of the car other than one or two external pics of it being driven "properly".
So this isn't my pic to share, but what the heck it was in a public place so fair game. I fitted the Dolomite fascia unit (obviously the Toledo originally had the flat fascia) and made the necessary brackets at the bottom of the windscreen for it to attach to. There really isn't a lot more interior trim, the navigator just has a seat and a foot-brace. The clock and glove-box are replaced by the extinguisher and cut-out controls, and - erm - that's just about it.
Ref equipment for the navigator by the way; having spent most of my adult life navigating on road rallies and co-driving on stages, I've very rarely used a trip meter - in fact, only on regularity sections on historic rallies. Never used one on a 'normal' road rally or on a stage (while it'd be handy on a stage, the amount of wheelspin on most stages means that it's pretty inaccurate). on road rallies you need a potti (illuminated map magnifier) and a map light (goose-neck thing), plus a box or two for clipboards and a pencil clip
I second what others have said about simplicity and weight saving. Once you have taken out all the carpets, you need to get tasty with a hammer and chisel and get all the mastic off the steel of the floor, back seat base etc. It's a rotten job, but it's worth another 20kg or thereabouts. Start with the basic principle that you take everything out, then only put back what you know you will need