Thanks, dy031101! I'll update the rules to make it a bit easier.
Updated Treaty Rules:
1. No aircraft or helicopter types that first flew after January 1st, 1980
2. No aircraft or helicopter types that were still in serial production anytime after January 1st, 2000
3. No combat aircraft with an empty weight greater than 50,000 kg
4. No armored vehicle types that were still in serial production anytime after January 1st, 2000
5. No ships launched after January 1st, 1990
Alternate timeline rules:
6. You can upgrade as much as you like
7. Major airframe/chassis/hull modifications (new wings/hull/engines) limited to actual or proposed upgrades
8. Number of aircraft/vehicles/ships limited to actual numbers built
9. Assume equipment has been stored since it was decommissioned or that it will be decommission and transferred to your country on January 1st, 2010
* - There's more modern options, so I think the arms control commission would be less lenient this time around.
So, the obvious one that I know people have been salivating over for some time is the F-14 Tomcat.

I've not the world's biggest F-14 fanboy, but I'd still be making it the backbone of my air force. Even so, there's some other great options out there in addition to the F-14. I don't want to steal anyone's thunder, though, so what are some of the gems you all would choose? There should be some decent late Cold War swag available.
Cheers,
Logan