[FunkyBoss]

Gears should be your top priority, best bang for the buck. With 4.10, I run at about 2600 - 2700 rpm's at 80 mph. If your really concerned about rpm's, 3.90's might be a nice balance. As far as pullies go, I'm pushing two 10" Power Acuistics subs with a 1600 watt Pyle amp with no charging problems. I believe it's 400 watts rms, however, I have heard people pushing as much as 1000 watts rms with no problems. Also, look into tuners, as they will allow you to correct your speedo for the gear, shut off your rear O2's for you O/R X (if you haven't already), and give you a slight increase in horsepower. Good Luck

 

[FunkyBoss]

$300 sounds about average. I got mine done by a friend of a friend for $95. He only wanted $75, but I threw in an extra $20 because the previous owner messed everything up in the rear and the swap was a big PITA. Any performance upgrade you do with increase wear and tear ever so slightly, but these cars can handle it. Small price to pay to go fast!