WM Peugeot specs?

I've been looking on the internet, and specs and info on the WM Peugeot LM cars has seemed to be rather sparse. I know that they had power from the Peugeot PRV V6, far more often than not in twin turbocharged form, and usually in 2.8 and 3.0 liter forms.

Outside of that, not withstanding Ultimate Car Page's bio of the WM P88 (all time trap speed holder at Le Mans), there's not much info out there on the cars, namely on the earlier variants.

I'm mostly interested in the P79 (best finisher for a WM at Le Mans--4th overall in '80) and the P81, the first car designed to the Group C regs (both of which were damaged in accidents--including one probably written off--at LM in '81). I'm mostly looking at chassis specs, dimensions, and what mechanicals they used along with the PRV engine.

Thanks in advance for any help.