Early Carrier engines

[Philliphastings]

Greetings all, for a while I have been scratching my head over what was the correct original engine for the Mk1 Scout.

I recently obtained a reprint manual for the Scout, dated 1939 and it states inj black and white that the water pumps were mounted to the heads on the carrier's engin.

I have located what I believed was my carrier's engine but the early pattern head-mounted water pumps confused me so I haven't brought it home yet.

Does anyone have a definative answer on this ?

I am, at the moment looking at either recovering the early pattern 21 stud block with single row pulleys on the water pumps, or a 21 stud engine which had double row pulleys and pumps in the front of the block, or a traditional (and later spec) 'Mercury" 24 stud engine from an Australian LP carrier.

All of the above will need a comprehensive rebuil but I want to get it as 'right as I can so would appreciate any advice...

Cheers

Phill