As long as you get the right size gears to suit your housing yes.
S1 + S2V6 = BW78
S2 LS1 + L67 = BW80
If you have an M80 you need M80 gears, if you have a 78 you need gears to suit a 78.
The ratio is irrelevant, you just need the right gears to fit your housing.