Got some more info from Alec yesterday. He says the car was in plain white and complete minus the engine when he saw it at Boreham in '73. His deal with Peter Ashcroft was that it be fitted with a brand new injected 1800BDA, 'on the key' as he put it. That's how he received the car in '73 and basically did nothing with it except maybe fit vented front brakes.
So by Gillian's time in '72 with Don Moore, Shell Oil and a 2060 alloy BDA (BDG) it still had AMR front suspension but had 6-link rear suspension on an Atlas, inboard coil-overs, ZF, BDA, large aluminium rear arches.
I have a pic of the Shell car in '72, if you send me your e-mail address I'll send it to you. Maybe posting the pic will jog some memories.
greg-at-huzier.com