I'm running Magnaflow (single of y to muffler, then split to duals out the back) on my '93 W150 360. I love it. A little rumble, but not too much, and not noisy at high speeds either. I'm not a big fan of loud and proud anymore. I'll be running dual Magnaflows on my '73 W200 360 when I get the dash back together and the truck running.