The rear engine mounts have a single vertical bolt on each side into the crossmember. The head of the bolt is probably covered up by gunk, but the nut should be visible just inboard of the frame rails.
Once those are loose and the transmission unbolted from the bellhousing, the engine will need to move forward to disengage the transmission input shaft from the clutch.

I think it'll be easier to pull the engine and transmission together. The torque tube has 4 bolts around the ball at the transmission mount crossmember and the lower two bolts also go thru the transmission mount.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.