"The closest factory car I remember that may have had probably had a decent factory warranty was a 605HP 2002 ZL1 Camaro the previous owner of my 69 Camaro had."
There was no factory warranty on any 600 hp 2002 ZL1. That car was built by GMMG and there are still angry people that ended up having to fix the engines themselves after the valve guides were shot after a few hundred miles due to lack of valvetrain geometry knowledge..
I would also take a Nickey over a Hennessy because he is a sponsor here and I have heard alot more great things about Nickey versus Hennessy.
Read this and tell me you would choose Hennessy.
http://www.caranddriver.com/columns/...s-they-can-run
And before you discount Nickey again because he does not open up some of his engines why don't you ask him before inferring his product is not done right.