Can anyone kinda explain to me what this process is? I’m trying to get into mini sprints and I’ve seen a few guys say for example they have a 04 with 06 updates. I assume its just changes/mods to the chassis to except updated parts? I’m driving 2 hours this weekend to go look at a Bailey’s Upright and figured I should know what this is just in case I purchase the car. The current owner states its a older chassis, but doesn’t know the year.