On a truck you can run a looooooooooooooong glass pack and it will sound healthy but still quiet.
Get the perforated kind, NOT the louvered kind. Get a 2-1/2" if you can, if it is loooooooooong it will still be pretty quiet and a single 2-1/2" is plenty good for a stock 292, you could get away with a single 2-1/4" glasspack too.
The short ones, car style, will be a lot louder though.
