I bought one of these a few years ago. I did have some problems. I did mount it and did the wiring. I put in new larger amp wires. I am thinking 4 amp. I think I kept the blue wire (sensor) the same. If I remeber right, the origianl belt is a 1024. I went with a 1030 or 1035. This is one a 240D. I didn't have to jack up the engine, or remove any brackets.
I did have problems with the holes where the bolts go through wearing. The alternator canted and was having problems with the belt slipping. I had the holes bored out and put in metal sleaves. Then I machined down the bosses and put some steel washers on both ends. It fit very snug. That has been just a few months or so.
Tom