I see Sim Dream have released the 1973 F1 Cars.
obvious aside, looks pretty good.
A shame they seem to be running on the same set of physics. Hopefully some of the usual suspects can come along and solve that - at this point SD's mods are just free assets for somebody to come along and build a better mod out of.
They also share the same cockpit, but tbh I find that to be less of an issue - tbf most of the F1 cars of those years did look very similar from the driver's seat.