GM 5.3 vs. Ford 5.4

Nope and chances are we won't see anyone really going down in displacement engines in thier tow rigs and yes towing and racing are two different things and and some are made as tow rigs ... Not sure what they had in mind when the 5.3 was disigned but plenty of people put 300k on them towing and in many other car makes they always say "what's under the hood" and the guy will reply quietly .... A small block and last I heard I know it was an old problem but never heard of a 5.3 blowing spark plugs out the bottom end . All in all they are both great It's just hard to beat that smooth sounding line of LS motors .