If I was you GTFO off this forum before they slay you like george did to the dragon...
If I was you I would look at examples of track cars, a lot of people mod differently as well, there is no wrong or right way but some common sense should still be applied. All depends on what your after as well and what tools you got to your disposal, also telling people of your budget as well as what tools you have can help with the forum helping you.
I think stripping is definitely the first and right step to a track car as it will see the biggest and quickest gains in terms of "BHP/tonne" as a unit, plus selling some parts to get money back is a good way to get some cash, the VR6 engines IMO are overrated, but each to their own. But it doesn't mean it will ruin your chances of having a car fit for a track, as long as it makes you smile thats all that matters.
Vents and heat issues are not a huge issue on your car being NA (naturally aspirated), so don't waste and worry about heat issues just yet, try and stiffen the body up, from bushes etc, tires will also play a huge roll, as your brakes are only as good as your tires. Then take your brakes into consideration, on smaller circuits you will be picking and braking frequently, so consider using slightly uprated brake fluid to cope with the temps (a possible product like "Castrol Super dot4" would be good as it would not be to expensive per litre compared to "castrol SRF"), uprating to steel braided hoses is another step forward, then taking into consideration which pads and discs you will use. I uprated my brake hoses and fluid, which stopped the spongy feel when the braking temperatures kick in, but then the pads started to bake and smoke (modding is a never ending game, you improve one thing to find you need to improve another), then funneling a cold intake to the filter is another mod that can be done, won't benefit much but still a benefit... Thats a staring point in advise, just take things step by step and read up on things as well as look at other projects out there, this will inspire you on what to do, as two track cars are never the same.
Plus it looks like your not to far from me

quite a few lads on this forum not to far from us