So i think i want to build a car for auto-x. Ive never done it before, or even been on a proffessional road track.

Ive been reading the rules, and just about everything on this website:
http://gttrackdays.com/rules.html

It doesnt seem to say anything about any car guidlines aside from saftey restraints, roll bars etc.

Does this mean that pretty much any car can enter, no matter the modifications to it? (engine swapped, etc) I talked to someone at a car show once and they told me the rules are very tight on swaps.

Can anyone point me in the right direction as far as other rules go, how to get started, and other general knowledge one should know before attempting something like this?

Im more or less asking these questions for next years competition, as im pretty broke, and would need time to get my shit in order.

any links, or comments/suggestions would be appreciated!