Pulling the 4.10 out of my car. I feel its just a bit low for i think i am passing the power band and not letting the torque pull long enough. I keep telling myself that a 2200 lb car dosent need much to push it. I run a 306, dart head w/ so many goodies its sick,plus a Vortech supercharger A trim.I figure the motor good for approx, 450-460 hp flywheel, but i sent my blower to vortech to be upgraded to a S-trim. The trans is a AOD with many mods and a TCI 3500 lockup converter. I can cruz at 45 in third at 3000 rpm, and 80 in OD at 2800 rpm. Its not the top end or the gas milage, its the fact that im gonna put about 100 more hp and the powerband might come and go that much quicker?????????????? I also have a set of used gears that are 3.73s, but they came out of my old 10.sec mustang w/about 250 passes on it, should i throw them away???