Sir Shep (many belated congratulations, by the way
I couldn't agree mor regarding flexi-cars. I used to rally and autotest (etc) a Frogeye and that thing performed way above its potential, aided by some suicidal driving...ahem....on road rallies of beloved memory.
The potential of a 427 was demonstrated on one occasion by Bill Murray at the Revival and he really drove that thing hard, finishing just outside the top ten at Goodwood, against the 'faster' cars. Just not quite enough to catch the GT40s (but I guess back then we're talking roller-rockers etc etc, are we not?)
The ability of an Ace-type chassis to flex was best demonstrated by Flavien Marcais at the Revival when he co-drove LOY 500, Nick Wigley's Tojeiro, in the first 'dusk' race. Flavien was really on it that day and I will alway remember the car visibly twisting as it went through Madgwick, holding second for much of the race against 3-litre C-types and Astons. It was ridiculous, but it worked, one of the best drives I've witnesed - proper fun! We went and checked the car afterwards and he'd split the paintwork all over the car, bits falling off in places!! That's what you call 'flex'.....I love it....