ive been looking to put a new engine in my gt. it has its original 4.6 v8 but its getting to 190,000 and starting to run crappy. i plan on rebuilding it and selling it but i want a new engine. what can i put in that will fit but have lots of power besides cobra engine

 

4.6 2V can make good power, too. Buy a forged engine and s/c it.