Dude, you know how much stuff I could do to a mustang with $40K? For a measly $8,000, I can put in a 514cu crate motor which produces 625HP. Spend another $4000 to add a s/c plus another $15K to replace the tranny and other odds and ends to handle the engine and it would spank the Z06. Then with the other $13K, I'd upgrade the suspension and redo the interior to exceed that of a corvette.