Everyone thinks I'm some kind of 273/318 hater, but that's simply not true. I have built numerous combinations of both, BUT the bottom line for MOST people is bang for the buck. So as a example, here is one I built back in 2017, and it has major restrictions. But for the sake of discussion, it is a .005 over 360, stock stroke, flat top piston, EQ heads very well prepared, but UNPORTED, with a 1.94 intake valve and a .420!!! Lift hydraulic flat tappet cam, a untouched performer 318/360 intake, with a holley 500 2 barrel carb. It cost my customer right at 6k at that time, parts, labor and dyno time. And unlike the 273 in the discussion which I think failed after a few pulls, this one is STILL running to this day.