It most likely has two massive turbo chargers so a bit of squeezing maybe needed. Not to mention a new gearbox and transmission. That sort of power would destroy the stock one PDQ.
I'd love to be a fly on the wall at the conversation with the insurance company. "But all I've done is remove one 4.6 litre V8 and fit another 4.6 litre V8, how's that an upgrade?"