quickest clutch replacement.

Fastest I ever did, don't remember how fast, was 55--57 Chev 3 speed. There is no crossmember, the engine mounts are at front of engine and on the bell. Hurst "misery shifter" (Mystery). Yank out the shift lever, undo the driveshaft, 4 bolts and the trans is out.
Pull off the dust cover which is likely NOT THERE ANYWAY and unbolt the PP

Most difficult thing, really, is turning the engine over to access the bolts