Obviously you haven't read the thread, he's already got a 11's 340, he's thinking about playing with a 273 and want's to know what it will take to build a low 12's 273.
No, I haven't read the entire post. I only spoke up when someone compared the 273 4 barrel to the 318 2 barrel, sure the 273 will rev faster because of more cr and cam. I think that dollar for dollar the 318 would be better but that's upto the op