On a slightly different matter...
Tamiya has recently released some "old" F1, and is relatively easy get "old timers body" like the Mclaren M23-Wolf-312T.
What is your opinion on having some "historical races", like those:
http://www.historicgrandprix.com/
http://historicformulaone.com/
Easy rule: mandatory tires those big rubber supplied with the kit, plus a 540j
This might encourage also some body maker in making more "old timers"