not sure where answerer MIKE V is coming from, but seems not so very clever....re mustang performance.
1st of all if you have a shelby gt 500 its running a 5.4L block with serious output ....and
2ndly the 4.6 mod junk he may be talking about in built out form gets to much higher numbers, much more easily than the engines he is talking about
best site for mustang performance is
cheers 04 cobra (575rwHP)