I am not a very smart guy and certainly not with a wrench, but isn't there a certain amount of risk one accepts by chasing higher hp in any car?
I know, the question doesn't help.
If this were a chat room, I'd wait for the OP to be away before asking. :\
I hope you get this sorted. That's a lotta money and heartache that I certainly wouldn't be happy about if I were in your shoes.