New Zealand's premier race series.

[Oldfart]

Allan I agree with you, in fact I tried to donate a trophy for Targa for the highest placed true "Classic" which had similar guidelines to what you suggest. The offer was declined.
Cars should be dated by the newest of the major components, shell/chassis, engine, transmission in my opinion. So your 1965 example with a 1999 motor is a '99. If it has a Jericho box, then whatever year that is.