here is a pic of the specv 6 speed gear set, it looks very similiar to the b15 unit, look at the size of the diff, it resembles a quife unit. the stack is still in the specv bellhousing in the pic.
here is the 20v bellhousing with the specv gear case on it
and for comparison, here is the b13 gear set, before treatment.
here is the 20v bellhousing with the specv gear case on it
and for comparison, here is the b13 gear set, before treatment.