Re: advice on mods
yes the aftermarket mufflers will help with some performance. and as for the filter i would stick with only the filter and not spend the extra money for the whole charger kit.
the little or no gain you would see is not worth the extra money you spend if these are the only mods you make. if you were going to dual exhaust or changing tha cat converter then you might see more of a gain with the improved intake.
the other thing to consider is if this truck has mass air it will respond better to mods like these.
i dont know what type of intake system it has but maybe 92 bigbronco does and could explain a little more to you.
i would rather push my Ford than drive your Chevy !