I've rebuilt my 143A. Let see I think the 110A-143A are the same frame size. The 150A is a little bigger- but all will fit. Big advantage is these put out a higher voltage- around 14 volts instead of 13.5 or so of the older ones. Headlights will be noticeably brighter.

You may need to clock the alternator rear body to match the orginal configuration. I had to do this- not hard. The regulator/brush pac is about $25-35 depending on where you buy a bosch one. Reliability is iffy on non-bosch ones. IF you spin it and it feels rough- brgs. The front brg may or may not be easy. Rear is really easy and cheap (6303 brg). You can get the higher grade synthetic grease, electric motor grade for $5-10 unless you want american and then figure $20.
The wires- you'll need to upgrade and make a new harness. The original 10 gauge wire just won't carry the current. The activation lead is needed- which is a switched source. It should be a round termial which goes on the stud- ? 4 or 5mm nut holds it to the alternator.
DaveM has some pics on his website. He made a harness for his 1987 300D. So you'll need something similar, but lengths may need to be different.


Michael