It could be just that. Have you taken a looksie underneath? Sometimes the answer will stare you right in the face.

I had a clunking problem when I would take corners. I swear it sound like an exhaust problem. Everytime I looked under I saw nothing. Until one day the exhaust broke in two behind the resonator. Before it broke it would swing over so slightly and bang off the weights on the driveshaft.

BTW, sounds like a sweet deal. We like pictures here. (hint, hint)

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R