My '428' is a 390!

[MetaJacko]

Hi,

Just taken my engin apart becouse the big end bearings were making noises.

Thought I'd check all the sizes etc and it seems I have a 390 at +40 not the 428 I thought I had bought

Anyway, the machine shop is telling me that there is damage to the pistons and cylinders and suggests a re bore to +60.

Is it worth instead to re-bore up to 4.13 (428 size)?

Other than a re bore and a 428 crank, what else would be needed to change this into a 428? Or in fact is it all a bit pointless and will not give me anything better other than saying 'its a 428'

Thanks

Paul