I converted my 68 to DOT5 about 5-6 years ago. At the time I was converting the rear to LBP (fronts were already 73-76 discs) and thought it was a good time to do it. Added a Line-loc. adj prop valve, new rear wheel cylinders, and Mopar aluminum MC at the same time so a lot of parts were new. I average 1000 miles/year and so far there has not been a single problem so I would recommend it. I Made a DOT5 label with a label maker and put it on the MC as a reminder.
We also converted my buddy's 73 340 Sport a couple years ago but he hasn't driven it. The car was sitting for the last 20 years and both front hoses were actually blocked with rust in the steel tube area of the hoses. I told him the DOT 5 would help because it just sits there.
