Hey guys i just bought a 96 z28 lt1 6 speed and am wondering what the stock gear is? Debating weather it is worth going to a 373 or 410. Any help would greatly be apperciated. Also if anyone has a 373 or 410 and knows what you would be taching at in 6th gear doing 65 or 70 ? Thanks in advance!

Should be a 3.42 in the stick car. I think Autos were cursed with a 3.08

http://www.ringpinion.com/Calc_RPM.aspx

here's a good calculator for the RPM question. Without knowing tire size I can only guess.