TIMING GEAR, CRANKSHAFT, DUPLEX, SPITFIRE, TR5, TR6

TR5 and TR250 (note there are two assemblies, single or double chain)
TR6 from 1968 to 1976
GT6 mk1 and mk2 (note there are two assemblies, single or double chain)
Triumph 2000, 2500 and 2.5Pi (note there are two assemblies, single or double chain)