Do GSL-SE have a groove in the AL rotor housings like the 12a do for the water jackets.



Do the gsl-se have the same number of bolts and bolt patterns as the later 13b?





can i use gsl-se in s4,s5,s6 ?

yes.



yes.



no.

I can be done, but it is a lot of work

Aren't there some 12A racers using FD end housings for their dowel pin strength?



I often wonder if filling the coolant passages in jacket-cracked FC side housing would make them useable in an early engine. Probably not, insufficient support and all, but it is something fun to think about while hauling a load of junk housings to the recycler's. It's always difficult to throw stuff like that away.