How much do you get paid on average when people come to you for an "ear dyno". LOL
don't get a 6 spd. horrible gearing for a v8 despite what everyone else here will say. I wuold say that motor is making like 200 whp. not all that great really. don't race any hondas. I think your exhaust sounds a little ricey too. Very 4 cylinder sounding.
nice rpoject but not sure what tranny would bolt up to drive rear wheels like that..
If you want a really good trans for it, then go to ebay and get a brand new 6 speed trans out of a g6. I have seen them brand new for as low as $400 shipped. All you will need is an adapter plate. Good luck in your progress looks good.