Pulling Slant 6 Without Removing Transmission

I'm trying to pull my slant 6 from a 63 Valiant without having to remove the drive shaft, transmission and bell housing. i've got everything unbolted, but the engine and flywheel/clutch assembly won't pull away from the bell housing. Am i missing something? i have the tranny jacked up a tad so it doesn't drop out and the motor mounts and clutch fork are unhooked.