SB 350/auto: Does anything hold the back of the motor up?

[MedicineMan]

I'm ready to drop my new SB 350 into my bodyless frame. Without support from the auto transmision and its crossmember, I can see that the rear of the motor will be unsupported and will droop and break the motor mounts. Have I missed something?

The truck is a 68 2wd originaly with a 250/3spd manual. I've got a new TH350, auto crossmember from early classic, and small block motor towers. I was going to drop the motor in to the frame today without the trans mounted until I realized all this.

thanks.