Hi all. Does anyone have M60E6 top covers? I would like to know its dimensions, namely length, height and width (in the marked places). I will be very grateful!

Here you go.  Also per our IM conversation this is a one time E6 measurement reply.  That rear dimension I don't have a good way to measure from that step in the top cover to the top of the rear but it is about 1" give or take.

On the front to back measurement, its 13" if you measure from outside the notch where the steel front each sit,  its ~12-7/8 if you measure from inside the steel pivot pin ear notch to the back.

All those measurements are the same on my E6 top cover. The last measurement is .120" FWIW