I'm trying to decide what front diff to use in my Escort, ideally it will be one from a production car that can be bought for a reasonable cost but it does need to be pretty strong too. I have considered an R33 Skyline unit with an aftermarket lsd as its quite compact but am unsure of what sort of power it can take and can't even find out what size the crown wheel is, anyone know? Obviously I need to be thinking about matching the ratio to the rear but I will think about that after!!

I'm prepared to consider any diff if any of you have any other potential candidates in mind, I'd prefer to integrate it into the sump but could remote mount it on a frame if needs be, it has to fit on the drivers side.

Any better ideas??