Factory service manuals have given different numbers for this over the years -- which makes no sense at all, because the studs are all 1/2x20. I agree 75 sounds a bit low ... if you're torquing dry threads. I use anti-sieze on ine, and with lubricated threads you should reduce the torque by about 25%. I use 75 to 80 ft-lbs on mine, WITH the anti-sieze.