buick 455 exhaust
hi i have a 73 riviera with an all stock buick 455 and its true duels with no cats, i was just wondering if i we're to put a cherry bomb glass pack on each each side where a catalytic converter would go on your avarage car and ran straight pipe all the way back to the back bumper would i have any back pressure with the glass packs being where they are?? or do glass packs even give backpressure in the first place? iv heard they do and they dont. and would that give me any increase in horespower at all? and to anybody that has done this befor, did it sound good?