so your quote is like the difference between App K (in its purest/legal form) and the more 'relaxed' Group 5 HRSR regs, just a few years later.
one thing is obvious, 'new' Septic saloons running in pre66 saloons are very fast and don't seem to be as they where in period in any way shape or form, least of all the App K cars ironically, interestingly no ones bothered prepping an HRSR spec V8 . . . maybe thay're already prepped that far ? ? ?
minis still do understeer power salides, cortinas still lift wheels, alfas still rust