The following 2 stories tell how I did it:

The engine was very weak in my second 122, Li'l red. In late 1977,
got a B20E first, but found that when the engine turned, it only
turned through an arc of about 270 degrees, and the distributor didn't
turn at all.
So I took it back and got a regular B20 which was better, and I
installed it complete with the clutch that was on it. When
installed the engine started OK but I couldn't get the car in
gear (I finally figured it out: the clutch was not disengaging.
Apparently the clutch plate was rusted to the flywheel.) Not
feeling like taking it apart again, I pushed the car out to the
street, put it in first gear and cranked the engine. It started
with a lurch and I was off! With one foot holding down the
clutch pedal and the other alternately tromping the brake and the
gas pedal, I lurched about halfway around the block in
increasingly traumatic lurches when the clutch finally let go and
I rolled to a stop. The neighbors were about evenly divided
between running for cover or rolling on the ground and howling
with laughter. From then on, the clutch worked more or less
normally except that for the following week it made a distinct
hissing sound upon being engaged (or enraged).


We made our 1994 summer trip in the 1973 164. We flew military
from Panama and got into Charleston, SC about midnight on June 15th. Because
of the Citadel's graduation and two major sporting events there were NO motel
rooms in Charleston, so we went direct to Mr. Weathers' storage place, where
we were pleased to find that our car started right up, in spite of having been
in storage since the previous September. Could NOT, however, disengage the
clutch, apparently slightly rusted to the flywheel. This was cured by
starting the car in gear, holding down the clutch and alternately tromping the
gas pedal and the brake. After about 3 good hard lurches it let go and
functioned more or less normally.
--
George Downs, The "original" Walrus3, Bartlesville, Oklahoma