Given that the 1967x mod wasn't yet(?) included in GPLRank and that their laptimes are comparable with the original F1 Papy cars, I did my GPLRank by myself using the same tracks and benchmarks than the original one.
I've a lot of missing entries, but I managed to reach -33 in my own rank, in which I'm the #1 !!
Well, I hope somebody (gplranks admins or Jani Posta) is interested to do something similar accessible to other drivers. I think this would encourage 67x-ers to improve times and explore the real limits of those cars.
I think Keith Ballard (Saiph) was doing an "almost-total-rank" with the 67x, uploading times to CRank by the moment.