I am building a 1978 911 into an autocross car and want to check what’s allowed, what modifications will bump me up into different classes, etc. Can you please point me in the right direction for the anticipated rules for next year’s season?
UCR PCA AutoX is a non-competitive event. Any vehicle can be driven.
There are more competitive AutoX events held in the US. Check the Zone 1 link at the top of the page for more info, or the main PCA site for details on the AutoX program.