Did mine recently and don't recall any drama. My accelerator shaft was out but other than that it just popped right in. I had a friend helping guide it.
Mine is in now. All as one piece, after all. Another 3 hours, but that was all by my lonesome, under the car, back up, down under, over and over again. Issues for me were the height of the transmission overdrive tail under the car, the clutch rod "zerc" filling hitting the floor board, the accelerator shaft connecting link hitting the exhaust manifold (in addition to the shaft, itself, hitting the engine and bell housing), the angle of the drop possible with my AC Delco leveling arm (which I find quite cheap in quality, with shavings of the threaded rod spinning off, rod slipping and other issues), and the new alignment of my motor mounts due to now having a new (not bent) engine face. I also removed the front bumper and got three more inches (I see yours is off). But, yes, patience and determination, the right angle of descent, and I finally cleared the bottom cross member of the frame with the sump left intact, though I did bump it a bit hard on one too quick decent. It's all just experience, help, and patience and I sure lost the latter the first time.