i have a 89 190E with a 3.2 m104.992 and a 722.369 transmission and have a 3.27 LSD and have no problem's with the rear end (came stock)

as far as running 130 mph in 3rd gear?? i'd have to see it to believe it.. cause mine runs 80 mph at 4'gs in 4th (i have a auto and the 3.27) but i just dont see you making that