The original metal oil pipe from the block to the filter head has been made obsolete by Rover but use this Braided oil pipe from the block to filter head instead.
Pre 1992 engines have 5/8" block union and 1/4" npt thread for the filter head
12A engines from 1992 on have 11/16"UNF block and filter head.
Therefore this kit is 5/8" block union and 1/4"npt filter head.
These are the following options of filter/block sizes for Pipe kits
Block union 5/8" and filter head 1/4"npt use TAM2106BRAIDED
Block union 5/8" and filter head 11/16"unf use
MOC1019Block union 11/16" and filter head 11/16"unf use
MOC1018Block union 11/16" and filter head 1/4"npt use
MOC1020