Agreed with firehawk. Your numbers are waaaaaaaay optimistic/unrealistic

and their just numbers. AUC and rotational mass are going to matter more.

with all that being said, is TT the way to go? how much TT add weight to the car? thanks!

Not enough to care and offset the amount of power you're gaining lol. With that said, maybe about 100lbs +/- a little.

I would generalize and say forced induction is the way to go if your looking for over 350whp. Both supercharger and turbo options give great results.

Why doesn't anyone suggest N20 when looking for more HP on the 370? Seems like with a proper setup/tune it could provide a viable alternative to other FI options. Not to mention a fraction of the cost.

Nitrous is great but not on the 370 from my understanding. Don't get me wrong, I'm all for nitrous, but I have seen allot of issues when installed on these cars. If I end up keeping the car for a while, supercharge or turbo is my rought. No since in spending thousands on little rwhp adders imop.