I didn't have a chance to look at my engine over the weekend but i'm 99% sure that DVLA will be interested in partial VIN. The other casting numbers etc. aren't unique enough to make it worthwhile noting them down. The reason they would need to know, is to ensure that they engine size is correct (so that it's registered accordingly for emissions etc.) and the other reason would be for dodgy / stolen / swaps etc. The only way they could deal with the latter is by seeing if the partial vin is matched up to the vin on the cowel. Hope it helps!! I wouldn't rely completely on what someone else put down on a registration document - some Camaro's and other GM cars are registered as GMC, probably because they intended to put GM and someone at DVLA couldn't match it on the system so just put what was there, GMC. Never know!
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