Hi Steve,
I am pretty sure your car is the ex- Ian Messner, ex Terry Daly car, which competed in a heap of ATCC, Semperit Series and also at Bathurst. I do have quite a few pics of the car mainly under Terry Daly ownership and one pic from when Ian was selling the car. They are all black and white in old magazines and i will need to scan them.
Don't get me wrong, but i think it would be a mistake to go modify your car with turrets, world cup cross member etc. Group C cars never ran with any of this, they were allowed to run most Group 1 parts as can be found in the CAMS homolgation papers for this model. Rear discs were also not allowed and only certain other modifications outside homologated parts were allowed depending on the year the car ran in. As your car has a lot of history and is the genuine article it is eligible to race in historic Group C - no replica cars can be built for this category, only genuine cars that competed in the day can compete now. Value wise your car would be worth a lot more if it was returned to it's as raced mechanical spec and livery, than if modified for fast road, hillclimb or track day use.
In the end it is up to you what you choose to do with your car, you own it, but consider that you do own a piece of Australian Touring Car history. Just like Nevilles car.
Consider too, that of the 25 MK1 RS2000's less than half made it onto the race track. A lot of cars that competed as MK1 RS2000's during the period were actually Twin Cams and 1300xl's fitted with 2lt engines, very few were the genuine article. And not all cars competed at Bathurst, and many only competed for one year. Your car was active from 1975 to at least 1978.
I have just spent 5 years correcting the damage that 2 previous owners had done to my car - a December 1974 build Vista Orange car. And that has got me as far as a fully painted rolling shell with a lot of parts to put back in. One of the previous owners decided to take it drag racing posting an impressive 10.6 1/4 mile with a turbo 2lt. Unfortunately in the process he caused enough damage to the body for my panel beater to have to change rear quarters, rear wheel tubs, front panel, rad support, trans tunnel, floor sections, part of the inner wing and repair nearly every other panel on the car.
Why did i bother which such a massive job? Firstly because it is a genuine MK1 RS2000, secondly because after buying it as a rolling shell (no engine or box) plus a heap of parts i found out that it had Group C history.
Knowing a few people who compete in this historic class and helping out at events for a number of years i quickly realised how much support and love of these old cars there still is today. I also realised just how many old touring cars a locked away in garages or museums and i think that is a waste. I would rather see them doing what they did all those years ago - race!
Anyway, they are my thoughts and as i said before what you do is up to you. For me i can't wait for the day the number panels go back onto mine and roll it out onto the track once again and hopefully give Nev, Bob, Derek, Eddie, Justin and the others some stick.
Glenn