[Lynn Eades]

Rick it worked like this (back in the day) I hope this helps. If you already know, It may help someone else.
Henry Ford had a number for each basic item.
For example;
A block is a 6010 this covers all blocks cars trucks tractors, 4,6, and 8 cyl etc.incl. America, Canada , England etc.

To get down to a particular defined model, you take the number that you have located on the exploded engine picture and you now hunt for it in the written section. There you will find that basic number (6010) but it will have various prefixes and maybe, suffixes with that number.
For example: (Andrew's supplied number) C99A-6010
The Ford of Canada 1941 to 1947 parts book(post war?) only supplies a C59A 6010 S block as a service part.
The 48 to 51 truck parts book lists a C69A-6010-S for the 48 engines (last with center water outlets) while my parts book for the war time CMP rear engined chassis (3 models) list a C19A-6010 S block.

So if you follow that you will now understand that Crankshaft pulley 6312 without the prefix, refers equally to an English built 4 cylinder Consul engine pulley.

Rick, you have mentioned the single sheave water pumps. Is this what is needed to fix this alignment problem? Is the belt centerline different from the two C.L's on the double sheave pumps
This book covers the CO11QR, C191QR, and C291QR. All these engines use single sheave water pumps. Does the Lynx use the same build motor?