Don't forget that Lotus had already run 2 x 997cc twincam 23s at the NRing 1000kms in 1962 under an Walker colours, as well as the 1500cc car for Jim Clark, the only one people remember.... the late arrival/installation for the 109E block may have caused the last minute prerparation of the car at the circuit.
Also, the legendary/notorious 23 which JC and Trev Taylor were slated to race at le Mans 1962 had a 997cc twincam, so the engines were not unknown at that time. Moreover, I suspect most of the development took place on the 1 litre block prior to the arrival of Ford's 109e? ISTR that Clark ran an Anglia with a 1000cc twincam at the time, as did, if memory serves aright, Mike Costin.
By late summer 1962 Brian Hart had joined Cosworth, as had Mike Costin, so access to a 1000cc tc engine, probably an old slave development motor perhaps, would not have been a problem at season's end.
For others to run these "old" engines in oddball Euro series a year or two later seems reasonable.
Roger Lund
edit, I suspect that Nosher ran the 20, or possibly a 22 in an end of season club libre race or some such, MMEC, North Staffs, etc at Silverstone. Any idea of the circuit, as that saves me retrieving my old Autosports which are in storage at present. I may have the programme here.
Edit; I have looked through quickly the obvious sources which might have shown my first sentence was correct. Nothing has been found so I must assume that I am wrong. RL
Edited by bradbury west, 11 November 2014 - 14:01.