hello nick wellcome to Lighting Gallery

those are nice Preheat fixture you got there, those Daylight lifelines are more rare then the Coow white ones
as the lamps are made from the very late 60s to the end of 1970s
As far as ballast goes, there replacement ballast kicking around on Ebay and Restore
the problem with Full power ballast is people dont know, and put in 34 watt lamps. The energy saving
ballast roaster in them, thinkin that they save energy, ends up cooking the ballast becase
the ballast is drawing more current then it should and cause them to overheat.
Universal 205 is good ballast replacement, and every now then you will find GE tulamp ballast
other than that it a great score