Hey nothing wrong with that...trust me there are plenty of engines that don't suppose to run that put up some livable numbers.
just by reading your last reply i would say that engine with a 308 gear and tight converter is laying all that 300 hp to the track ( no spin) which results in your 13.66 et....
put a 600hp engine in your truck and drive it the same way and you run a 15.66.....
