@Gavin692 is right about that flaking problem. Had a buddy use one of those logs last winter, thought he was good, then woke up to smoke pouring out of his stove pipe. The creosote chunks were still glowing three days later and almost caught his roof on fire.

But hold on a second, I gotta push back a little here. If that old Bridgeport has any slop in the leadscrew or the X-axis nut, climb milling is going to grab and pull the table like crazy, which is exactly what makes chatter way worse. I've seen it a hundred times on worn machines where conventional milling actually runs smoother because the table is always under load from the cutter. The rule about climb milling being better is only true if your machine is tight, otherwise you're just fighting the backlash and the spindle bearings at the same time. You might want to check the gibs first and see if there's any play in the table before you blame the technique.