On my now extended test drive (1984 RRC barn find rescue - 41kmiles) I noticed a bit of a wobble and every time I stop it seems to lurch back just a little bit. Like something was loose.
Well as per picture above, I found it. Turns out this part changed in 1985 so not available in the US and had to order from UK. You can buy them for $5 each (Britpart), but decided to go for Bearmach at $20 each. Should be quick to change.
Keep finding things every week. Nice to keep busy, but it is a little hot in Houston now.