Clunk could be trans or engine mounts. The "freewheeling" thing may be torque converter unlocking as you apply the brakes, im assuming it happens after car has been going for a little while yes?
P.S. Dang my mom looks young in that photo, why she spread like that?
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Chris
"A person convinced against their will, is of the same opinion still"
New?? Find the downloadable SVX Online Service Manual
Here
RECOMMENDED READING for newer SVX owners
Here some cool info if not fully accurate.