Very interesting but fairly obvious, I suppose . . . What's odd is that, based on the 8-point system, my Camaro has a chance of passing, whereas, when I'm done the Cadillac will not !
There's two morals, here :
Firstly, as someone pointed out - make sure your modifications look good enough to be believed as stock . . . very difficult but possible.
I know I'll need to notch (or even completely replace) the front cross-member on the '58 to get the new motor in . . . the bonus is that it's MoT exempt so I really don't care !
Secondly - and most importantly - make sure you've got a "friendly" MoT tester who's not an ar$ehole. If you don't have one, or can't find one, DO NOT modify your chassis or body shell. Replace your shocks and springs, fine, but anymore than that and you may as well bend over and hand them the K-Y.