Crossing the border:
Mike at innovative crossed with his track car unregistered and to my knowledge, he was never asked for paperwork or even stopped for inspection.
TMP:
This place is true “open lapping”. You can bring pretty much anything you want, as long as it runs without leaks. There is no tech inspection for open lapping. I have been there when full blown IMSA race teams were there testing cars during open lapping-- stacker trailers and all
Watkins glen:
WGI does not host their own “open lapping”. They rent the track to organizations that set up the run groups, tech requirements, insurance, medical staff, etc. Each organization will have a different set of rules for what is required from you and your vehicle. Many of these groups have daily tech inspections with lists of items that you must pass.
A few things to remember:
Every organization requires equal safety equipment for the driver and passenger. This means you can not run a fixed back racing seat with harnesses for the driver, and leave the passenger seat stock with stock belts. Whatever the driver has, the passenger needs to have. It is not safe or polite to have an instructor in your car with lesser safety than you bought for yourself. In every organization, you will have an instructor to start. Almost none will let you on track without at least being signed off to go solo. This is for the safety of everyone.
I will not drive on a big track (WGI, mosport, etc.) without a helmet, seat, harnesses, and HANS device. These items are pricey, but they will save your life in the event of an accident. Accidents happen a lot more often than you think. DO NOT SKIP A HANS. A brake failure at 100+mph could put you into a concrete wall. I wouldn’t want stock restraints at that point. Look up youtube videos of accidents with HANS vs. no HANS and you will see why they are important.
The more money you spend on the car, the less time you spend on track (unless you are made of money). It may seem fun to go from 0 to a million with a full fledged track build, but all that time and money could be spent being AT THE TRACK learning to drive faster. What I would recommend is starting with basic mods (tires, brakes, fluid, cooling, reliability, safety) and then upgrade things as you feel they are holding you back. By building the car piece by piece, you can FEEL what changes on the car and learn more about how different parts effect the cars handling. Take this from someone who has done this a couple times.
Are you dead set on that platform? I’m now a firm believer in buying a pre-built track car. The parts are so ridiculously expensive. A 3000gt isnt exactly the platform I would think of when I was thinking of building a track car-- I’m not sure I’ve ever seen one at the track.