And just for comparison, and while I too have always read the same advice re this, I have run koni yellows in my 1750 GTV for the past 12 years with no problems.
I used to have Koni reds revalved to yellow specs in my '73 2L Berlina, with shortened firmer spec springs all round, which I mostly used on the road but as well on the track and again no dramas there either.
So I guess on that basis, perhaps it really doesn't matter all that much ??? I will be running Koni yellows in my Giulia Super, when it is finished. I also have Koni yellows for my '69 Fiat AC 124 sport. So perhaps I am simply biased towards these
