Hi Jim,
Welcome here, you're in good company!
Personally, I think a 72 frame is stretching a bit the vintage cut off date, but you never know until you ask and get the answer from the horse's mouth...
One could say a 100,000,000 year old dinausaur is the same family as a 200,000,000 one ; O )
Patrick
PS: Thanks Graham in Aus for pointing me towards this thread!!! I'm well and looking forward to saving some money and come again to Speed Week 2017... Richard is also tempted by another trip... What do you think? I'd love to have the old 2013 crew together, we did sterling work in that short space of time despite the problems... and a 121.775mph brass plaque to boast about : 0 )