I have to admit it's been a very long time since changing a 240 clutch cable. My recollection is that the early cars had a threaded end cap and a locking nut on the far side. Later cars had only the adjusting collar on the forward side which moved the sheath back and forth. Sounds like you need to remove the part you called the grommet from the bellhousing bracket and fit it directly onto the cable before inserting the cable through the bracket (does the new cable already have this grommet???). -- Dave