Joel - that 31 is flippin sweeeeeeet!
There's always next year to get it ready for. I think this class would be allot of fun.... but there are alot of loopholes as mentioned.
Requiring all exterior engine parts to be of a certain date range would make it more interesting - like dual points or magneto's, older carbs and intakes, etc....
It would be way easy for somebody to take an uber tech'd out all forged bottom end titanium valve train roller cammed small block that rev's to 9500 with a pertronix in an older distributor and an old intake and holley/rochester / carter and still make gobs more power than you could in the 60's.
Is there a practical way to inspect for roller cams? - could be another requirement, no roller cams.... they weren't common until what - the late 90's?