in a 4x4 application it is very subjective, and very sensitive to the actual engines as to whats gonna do better.
i would hope to tell ya my truck is faster then a 4.0 too, but only when equally equipped. with the 35 in muds on i cant rip a 17 with 456 gears. with 30's i am low 15...if all is right 14's can happen when it was under 7 inches of lift. you take a reg cab 5 speed 4.0 with stock to 31 in tires and it should easily run mid to low 16. if i am on 35's i will get spanked. ext cab to ext cab with 456 and 35 in tires, when in situations where slow steady torque is not getting it, i have what a 4.0 does not....the power to break everything faster attempting the givin obstacle. and a shit ton more heat to burn my feet off with and i wouldnt have it any other way
a real small 4 bbl or 2bbl on a good 302 would be nice wheelin in mi, or any flat mud crap stuff...well flattish.
but following me in my favorite places in states elsewhere will only render it on fire or helplessly trapped using the starter and 50% available power to get things done. a 4.0 will just make it look stupid. i see it all the time. then again technical wheelin stuff is the exception as well in general.
as for carb being easier then efi on a ford smallblock swap, i would have to say that is subjective as well.
there isnt anything v8 easier to swap into a efi ranger then a 5.0 efi engine
only a few wires to that as well. no way i would want to wheel with a carb. unless it was a web on a spinnin four popper or a 1bbl inline six....in a jeep.
carbs are for turning 10's on the cheap
i would like to see a heads up race between dishtowels rig and a 4.0 rig set up the same.