1. First, I need to find the slick&skinnies fast. I've order a set from Hennessey last month but it seems like he took my $3000 and ran away!! I'd need to buy them asap new or used, but I don't know where to look, please help!!
Ditto others above
2. With the slick&skinny, at what RPM should I launch? and at what RPM should I change gear? Also need to know the proper tire pressures.
Never tried it but I've been told 5,000 RPM and dump the clutch for launch. The 2,500 is more for street tires.
3. Is adding a BTR NOS-propane onto venom 650R a bad idea?
Good idea, the 650 is just heads & cam so the nitrous will work good with that. Be careful of running lean if it still has a stock fuel pump.
4. where can I buy the racing suit and helmet?
www.jegs.com
5. Any advise or inputs are greatly appreciated..
Your going to need some serious power to take that Supra, but the Standard BTR nitrous kit with slicks/skinnies would make it a very close race in the 1/4 just don't do any high speed highway runs afterwards.