Engine number

I'm currently rebuilding a 1966 2a and am a bit puzzled regarding the engine number. The number is 90618309A, and is a petrol engine. However when I look up engine numbers it states that 9061 should be a diesel engine. Also it has the name Bilchrome cast into the block. I understand that petrol engines should be 9016, which my previous Series 3 was.
Can anyone shed any light on this?

I don't think its impossible for someone to reuse a diesel block with petrol ancillaries but I don't know easy it would be to do.

I always thought it was the same block, as at one point LR would convert your petrol to a diesel

The engine Ive got at the moment has a says its a petrol block but its diesel

Same blocks for both

Anyone ever came across an engine number like this --> K07462000
Having a hard time trying to figure it out.
Thx

Jake P said:

Anyone ever came across an engine number like this --> K07462000
Having a hard time trying to figure it out.
Thx

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Could you post a photo please?

rich201283 said:

The engine Ive got at the moment has a says its a petrol block but its diesel

Click to expand...

same block

Hi, sorry for the late reply. This is the engine no.

Jake P said:

Hi, sorry for the late reply. This is the engine no.
View attachment 197909

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thats either a reconditioners number or just a made up one