Ok I will write down my run, I don't have a replay because I didnt save.
I spent a morning trying to gold this, the C8 is a very hard car to control, understeer and oversteer galore.Little throttle input may ruin perfectly fine lap times, I tried for like 3 hours to nail it, being smoth, entering corners at the right time trying not to go wide and really concentrating on the exit trying to slide as minimally as possible, I could not get past this challenge, the best time I got was 1:17.268 if Im not mistaken, I was like, damn.
Then I thought about changing entirely my concept, you want to slide you silly Alfa?Then that's what you will get, it took me some tries to adjust how much I slide and after some tries guess what? 1:16.8xx, ye I beat it, don't overdo it and remember the first hairpins are crucial you should be leaving the bridge at no more than 35 seconds, from now on it's just simple a matter of practice you may want to go apex later and go a bit wider so you can get on the throttle earlier in that turn after the little bridge, your time entering the tunnel should be on the high 49's, low 50's, after the tunnel slow down to about 134km/h you should approach a little bit of gravel on your left side at 1:05, brake before the gravel bit on your left just after the right one I mentioned ealier or will understeer and go wide losing time, this corner is crucial it can and will ruin perfect laps,believe me I know, I tried to apex it as late as I could and try to hit that little gravel bit on the right when you are exiting it, be careful exiting this bend, its kind of bumpy and it may upset the balance so don't get to cocky about the throttle.
Hopefully I was able to help, it is a hard challenge because what I thought I should be doing turned to be extremely harder than to try different approaches.Good luck.
