You can come and get this B-body one I have in the garage for $75.00. It has a 489 open case with 3:23 gears. No backing plates but the drums and everything else is there. Came out of a 69 Charger. Geof
I have an E-body housing and axles that have the spring perches already cut off very neatly. I've got new perches to go with the housing. If the one from cosgig doesn't work out, let me know.