Since you ask: crankshaft and big end shell bearings (for the above reasons), bumping clearance shims, connecting rod (narrower small end bush), piston, gudgeon pin, piston rings, cylinder block, cylinder head gasket, injector pump, element, injector nozzle, inlet and exhaust valves, cylinder head, and rocker shaft pedestals*.

*The CS3-1 uses two rocker pedestals instead of the more familiar central single rocker pedestal. An identical two pedestal arrangement can also be seen on the VA engine.

It is also possible there are differences with the flywheels, due to the differing weight of the reciprocating masses.

Finally for any prospective purchasers of a Lister CS 3-1, unless you know that the Chome cylinder bore and piston are in excellent condition, think carefully before buying, as new pistons and cylinder blocks are rare in the extreme, and converting to CS 6-1 specification will be expensive.