Like a retard on Viagraok, you guys are thinking to hard about this.
Here is what you need. Buy a ls1 and put it in a fox!! maybe throw a procharger on it and a 6 speed. Thats all that you need. Throw on a good suspension and some sticky tires, you should be able to hang with a zo6.
If you wana do it and have some good street manners then slap one of these in a Fox and hold on for dear life