Which car and motor are you wanting help on?
I use to install BB in early (pre 1971) B,E and A body with the tranny attached to the bellhousing and motor, on 426 Hemi motors I would install the motor with the bellhousing and clutch installed on the motor and install the tranny from the bottom
![wrench wrench](/ubbthreads/images/graemlins/custom/wrench.gif)
It depends on many things, some guys like to install the motors with the tranny on the K member and lower the car onto it fromm above like the factory did on the assembly lines, not me though
![down down](/ubbthreads/images/graemlins/custom/down.gif)
I don't have the equipment or desire to do them that way