#1) You might want to check into this. I was told (again, by ackits.com) to install the required amount into the compressor, 2oz in the r/d, and the rest evenly throughout the system (which I think equated to some in the condensor and some in the suction hose). It seemed logical to me to evenly distribute oil throughout the system.

#2) I went with the 14x22 inch condesnor because it was the closest size to the original. It fits nicely, but as you know, the bigger the better. I think it would be really tough to fit a 16" unit in there. I would say you definitely would need those fabricated hard lines to bring the top and bottom condensor fittings down to the opening in the frame. With the 14" unit, I JUST barely had enough room to instal custom made rubber hoses (one runs directly from the bottom fitting on the condesnor to the r/d, and the suction line connects to a separate "S" shaped hose that connects to the top fitting on the condesor). And even then I had to open up the bottom of the opening in the frame to make it work.

Good luck,

GregS
'84 300D, 174k
'90 300CE, 164k