This pulley is used on the Lister CS radiator cooling kits to drive the fan but due to requests for just the pulley from these kits we have made it available separately.
These are designed for a 14mm shaft but they also have four mounting bolts so you could potentially bolt it to a flange etc rather than a shaft.
From feedback we are told this pulley lends itself quite nicely to driving an automotive type alternator on your Lister CS engine.