That was a great battle, those Cosworth's run hard. I owned a modded Merkur in the late 80's, even the little 2 litre 4 cyl ran hard with an intercooler and boost mods.
Gotta love those 917's. There's plenty of them in Steve McQueen's movie "LeMans". And yeah, RUSH was a kick ass movie. Still wondering how the museums were talked into running those 70's F1 cars. Maybe multi-million dollar insurance policies?