318 will blow away a 4.7 in pulling. Empty they run about the same except you got to turn a few more RPM but when they are loaded the 4.7 got no nuts. I have had many of both trucks and towed with most every one of them. The 4.7 engine issues far outweight the 5.2 trans issues.

I am not causing global warming, I am just trying to hold off a impending Ice Age!