Clutch rattling? Lose starter maybe?

Del, can one see the retainer tube just pulling the fork boot?

Been a very long time. Probably. Might need a mirror. Might need something to probe with. You need to get creative. Get a screwdriver, etc. Remove part of the linkage so you can "move things." Figure a way to SAFELY get under the car and listen, maybe using a length of hose held to your ear.

Stuff it could be in no particular order

Loose bell bolts

Loose transmission bolts

Broken clutch disc springs

general problems in the fork, IE off the pivot, broken pivot, bent, broken fork,

bad throwout bearing, noisy throwout bearing.

Problems in the PP. Broken release finger, broken spring in the PP, etc.

not enough free play. This is a problem with different clutch pressure plates and the under-dash return springs. You have to use your head

Does the clutch release and engage nice and smooth? Does it "speed shift" clean? Does it shift "easy" into reverse, without grinding?

Visually inspect........is the TO away from the clutch PP release fingers? This you should be able to see with the boot removed, again might need a mirror and a good light.

Also look for stuff rubbing on the linkage transferring sound

On that subject, do you have all the floor boots, etc installed? These cars "sound" incredibly noisy without the floor mats, boots, etc installed or with something rubbing that transfers sound from the engine / transmission to the body / frame.