My truck its a 1987 chevy c15 with a 292 all stock except the exhaust where i install long tube headers by hedman, dual exit pipes into glasspacks near 36".....

The sound is raspy but deep, the pipes ends at the middle of the truck not at the rear bumper...
Sounds very monstruosity... hahaha

I will post a soundclip...
and the comments that the glasspacks are very restrictive its very interesting, I think i will change with other exhaust system.... like turbo mufflers or something like that..