The `fore arm' (called a tie bar) has a rubber bush in front of and behind the bracket on the subframe. The nuts are done up TIGHT to the shoulder, they are not designed to let you adjust the castor by leaving them loose...!
The lower control arm has 2 rubber bushes at its inner end. Early cars (850 etc) up to 1966 I think, have a plain hole in the arm, with shouldered bushes. Later cars have a hole that is tapered both sides and takes tapered bushes which have a steel insert in them.
Poly bushes are available, but I find the originals last well anyway.
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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.