We have nose rings in our hogs... to keep em from rooting under the fences.
He is however way off base... there are some bad mama jamma 4cyls around... they just cost a lot of money, there isn't a whole lot you can do on the cheap to get power out of one. Turbo's are the way to go, but do you really wanna rebuild the entire engine and drop that kind of coin to pull the true power potential out of it?
I'd just do a nice exhaust and free up the intake and drive the hell out of it... then later down the road dare to be different and bale on yet another naturally aspirated v-8... like a bellybutton.
I have the truest bellybutton in the world... a red camaro with a N/A sbc 4 bolt main, but i did just get my set of Keith Black pistons in... and aluminum heads are on the way to replace my worked over 375hp double humps, so i might just keep picking my bellybutton for a while.
But dang I always wanted something along the lines of a 600hp 4.3 liter v-6....... or a 3.8 guess after modding diesels and v-8's i just have an extreme drive to do something off the wall. It's all hp and tq, it's all bada$$