fair enough man. clean look is always good!
ya, that extra mount arm hole should be able to suffice as a ground connecter. way i did it was...mount arm to frame of car. same goes for the driver side, using that hole you attached the PS res to.
koni yellows are pretty much stock right? if that the case....change them. the s52 will be heavier and definitely will blow out your shocks, even with stiff springs!
is the exhaust manifold made to fit the e36? or custom for the e30...i had a problem intalling the engine with the manifolds attached, might have just been the excess down piping...but def keep that in mind. you prob wont have to though.