I have bought sold almost 40 sports & muscle cars over the past years so I will chime in on this one. When you say you have all the metal to repair the rust car I assume this means floor pans, doors, fenders, etc. Doors and front fenders are a bolt on affair. Floor pans and rocker panels on the other hand are weld-in and require the obvious tools to do the job but also the skill to do it right. If the clean car does not handle properly due to the accident or cannot be repaired it may be a case of cutting your losses with it and enjoy it as is. If you can fix the handling issues then I would say leave the car clean and all stock. That way you can have a car that is stock and then a modified turbo car, best of both worlds! Matching numbers is over rated in my opinion and only true high grade collector cars warrant worrying about it. I agree, low # Series 1 cars fall in to this category as long as they are in good condition. The posts above call out some really good points. These cars are meant to be enjoyed, both driving and wrenching on them. Take stock of your skillset and determine what you can and realistically cannot do. If you can't weld or do body work to correct the rust then you need to factor that in to your budget. In the end, whatever you do with each car you want to be done right, be safe, and more importantly be fun to drive.