In my opinion, your worry is pointless unless you match your model tail # to the correct block,and correct MLU configuration. Most award winning Vipers Ive seen have incorrect antennae placement, incorrect engine exhaust/inlet configuration....right down to incorrect ordnance loadout. Plus most models have the standard Block 30 cockpit. I think judges don't notice, or just don't care. But I do 😁 LOL.

Don't even get me started with wheel size!

I would start by asking the manufacturer what in the world did they use as a reference? But they'll probably deny the request.

David