muffler(s) on a Slant Six?

I like the Magnaflow straight through round stainless mufflers for 6s. The Flowmasters are too loud for my taste and drone too badly. Just remember, the longer the muffler, the quieter it is for a straight through. The diameter does effect loudness, but not so much as length. I haven't done mine yet, but I plan on a 2.5" Y pipe off headers and into a single 3" pipe out the rear with either a 4" or 6" body diameter straight through Magnaflow....whichever diameter fits best. The thing I like about the stainless series Magnaflows is that they are made completely of stainless. Even the stuffin.