4.10
 

i just put 4.10:1 gears in my 01 v6 how much time can i expect to shave off my 1/4 time

depends on traction and track etc.... but generally its around 5tenths or less off your time. Your first few time sout might be slower till you learn to launch well with them.

if you do posi you could shave a good bit, depends auto/manual and if you can drive.

I was thinking about switching from 3.73's to 4.10's . . .

When I got my 3:73, posi, and tune, I only shaved off two tenths, sucked, but its becuase of spinning and only getting 4 runs.