Yep I love my old 066, dual port muffler, bone stock that it is--about the only stock saw I run. I only use it with a 36 inch bar.
So I don't break out the Greffardized 3120 all that often, but when I do, there ain't nothin' that'll slow it down! I never use the 36 inch bar for it, only the 42 and 60.
However, my Walkerized 372 gets the most use...and a PP Dolmar 7900 is being readied by the man, Dan!! And I'm sending him my new 346, so that my Greffardized 346 can have company.