Peter's car is up for sale on the CTCRC site here
http://www.csccgb.co.uk/pages/sales/salesframeset.asp
I always thought the Mk2 Escort was equally or more competitive than the Mk1. Is the shell not lighter on the Mk2? Another advantage of the Mk2 Cortina I would have thought was that you could use the later 1600cc crossflow engine whereas the Mk 1 like Zef's is stuck with the 1500cc pre-crossflow. unless of course you are talking twin-cams then there would be no advantage and definitely a weight disadvantage.