Looks like a fun time, any mid or rear engined cars there.
Yes it certainly was fun with a capital F.
Unfortunately I didn't get the time for much photography but there were many mid/rear engined cars competing including Ford GT40s, Lola T70 Mk IIIs, McLaren M1B & Cs, Abarth Osella PA1, Cooper Monaco King Cobra, Chevron B16, etc. plus many Porsches, both 911s and 904s.
Have a look at the Spa website -
www.roadbook.be - to see the list of cars competing.
There are also numerous YouTube clips covering the event.
One of the outstanding (and surprising) cars there was a Talbot Sunbeam Lotus saloon, highly modified but was lapping only 1 second slower than the fastest GT40.
There is a good in-car footage of this car driven by Joss Ronchetti - pure magic!