The original mini upper engine steady that always needs the bushes replacing (they are
CRC5329) and the longer of the 2 securing bolts, if it looks worse for wear or broken, is
BH605151.
From 1990 on when the 1275 engines were fitted the
21A1817 bar from the old Austin Morris 1100/1300 range was fitted which, along with different engine mount positions on the subframe, pushed the engine half an inch further forward.
From 1996 cars were fitted with a one piece bush on the engine which is interchangeable with the 2 part one. See
KKF101320.