Is it vintage

[Backforfun]

Hi!

What are the rules on vintage upgrades ? What can you do to a car ? For example if I put X11 gears in an old pred I'm not running a vintage car ? And surely part or the fun is keeping them safe etc

I'm not saying I don't agree just interested in the rules ? If that's the case why can't I put an old she'll on my X11 and call it vintage ? As an old pred can be upgraded