What engine number for an engine conversion on the V5?

[mr_fish]

taken from:

https://www.gov.uk/change-vehicle-detail...ce-to-give

Engine number or cylinder capacity (cc)
You’ll need to provide either:

a receipt for the replacement engine
written evidence from the manufacturer
an inspection report provided for insurance purposes
written confirmation on headed paper from a garage (if the change took place before you bought the vehicle)

I kinda did the bottom two together as one...inspection report from a garage