[KTL]

Well I would strongly argue that updated chain tensioners (and hopefully updated wider, bushed chain idler arms too, because the un-bushed idler arms are a known failure point that was often improperly stated to be chain tensioner faliure) is definitely not molested. That modification is a proven and accepted fix designed by Porsche. Porsche actually issued a technical bulletin recommending the updating of the tensioners. That said, old tensioners can be rebuilt and made less failure prone with some other means of attention.

To continue using parts that have been identified as problematic or less reliable, simply because they're what the car was originally equipped with, is a dangerous game of chance in my opinion. But if it's just going to sit in a garage as a showpiece and never be driven, which is a shame in my opinion, well then by all means keep it as original as possible if that's what floats your boat.

I would consider unmolested as something that can be easily reversed, with the caveat that the original parts are still on hand. My former '87 911 was pretty much all original. But there were some things I wanted to change. However I always had in mind that whatever I did needed to be easily reversible, should I ever sell the car. So I kept all the parts I changed-out and when the time came to sell, I put it all back together mostly like it originally was. One upside to that modify-then-de-modify adventure is that the next owner received a massively cleaner car inside, out and underneath, than he would have gotten had I not done all those things to the car and then un-did them. I just can't take dirty stuff apart and put it back together dirty.

Opinions vary. I personally believe some folks need to adjust their perspective on fixes or modifications done to these cars. Sure it's a highly regarded car. But please don't tell me what I can and cannot do to my car. If you don't like it? Too bad and I say please look elsewhere for your 911 purchase because i'm not going to discount the price simply because our beliefs don't align. However I completely understand that the recent market craze tends to value originality far above all else.