I don’t believe the length or bolt patterns are right. Also the front housing on a 60/80 bolts to the trans body and it’s the other way around on a T-56 setup
When I pulled my auto the two bell housings looked so different I wouldn’t bother trying. They have one thing in common… Engine block pattern… <-Duh
Probably be easier to just get a steel SFI Bell if ya cant get a stock one cheap enough. Also remember that the LS has different ratios than the LT and even some years of LT1 T56s differ. Tho you can always just get the ZO6 ratios if ya gotta take it apart anyway.