After wrenching on a few bolts on my 71 FJ40, it's painfully apparent I need an impact wrench. Sooooo, since I know zilch about them thought I would solicit some suggestions. Brands, size, sockets, torque, etc. Thanks. Oh yes, and my compressor is oil lubed from Lowe's and is 5.7 at 90# and 6.8 at 40# and has a 30 gal tank.