Tire preservative?

[Dr L-88]

I have an old set of Goodyear Bluestreak Sports Car Special racing tires (with inner tubes) mounted on a set of magnesium Torque Thrust D-spoke wheels that I would like to put on my 67 for a photo shoot.................maybe even a short drive sround town. Problem is that the tires are slightly dry cracked on the sidewalls. Does anyone make any type of preservative that can be applied to the tires that will help preserve them or maybe even soften them a bit? Thanks in advance for your help. Rex

[Gideon's_Test]

The best product I have seen for preserving/restoring rubber/vinyl is Aerospace 303. It's expensive, but it does more than just make rubber look better...