I still think most of you woud prefer in cockpit view. It's pretty good in GT6 for most cars.
Try these settings and see after a few minute's if can match your normal lap times and race awareness. Set Blind spot indicator to "On". This really gives you an awesome indication of a cars proximity when overtaking so you know when to hold your line or pull in because the pass is made. Second and most crucial is to set interior view angle to "Narrow." Now optionally you can set your "Mic Position" to Hood/Bonnet. This sounds a lot better in most cars.
Anyway give it a try in race and see how you get on. Once you get used to it then racing just the speedo or hood just doesn't feel right after a while. I do a lot of Spa quick match in the Team Peugeot 908 and I never have an issue with situation awareness.
I tried this and this is much better for view and sound for me thanks for the tip (the road noise muffle/bass has gone now) 👍