I would like to now the torque needed on the bolts that connect the low and high pressure lines to the compressor. Since there is an o-ring I would think there is no need for a high torque, but I have been known to be wrong before.

 

Best answer would probably come from a A / C shop on the Denso manufactured 10P series system as can't be too high for the aluminum B nuts

Probably needs tread lube like maybe mineral oil or PEG oil that you have reserved before servicing