If your building a rep, why not go for a touring car replica? Stickers may not be cheap but a complete replica set is still gonna be cheaper than a full respray and it would hide alot of previous dodgy paint. Also if going for a touring car rep you can strip the inside out and fit a pair of buckets....cheaper than buying a decent complete 3dr interior....and the weight lose will make up a little for your lack of power. If you doing a race rep, you've got a more to play with ie you can get away with a few wrong parts. Doing a full on 3dr replica, if your doing it all properly will get very costly imo.