im not trying to start a little tiff here..but -

i have seen ford A4LD trannies bolted up to Frod Taurus SHO engines (yes, set up conventional) and they took the beating at the strip, even some with the SC Set up.

the A4LD is know for breaking on its own just fine.

A4LD rated for like 160hp
SHO puts out like 210
im guessing here, no real facts, all guess

I think a MB unit should hold up to this upgrade of 260/300.