Need An Upgrade Tranny SL6

Looks like a stout slant 6. What ET does it go now? A properly built 904 trans will be fine.

sweet about in the 904! im not done with the slant yet still have more stuff ujp my sleves for it. i havn't run it yet cuz the tranny but it should be in the 13.5 to 14.5 right now. i have a 8.75 with 3.91's/posi to go in it to.