Ray
That number does not seem to be in the CKD list for 1950, so is most probably a fully assembled export vehicle from Solihull.
No the engine number will rarely match the chassis number, they are usually within several hundred of each other. Yours quite possibly the original.
Have you tried the British Motoring Industry Heritage Trust in the UK? They have the original dispatch books and this usually includes the engine number and colour.
Diana

