Yes, that's the real stuff. Commonly available in KL, Ipoh and Penang, but not in Singapore or even Johor. Thick black soggy but tasty stuff.
To be fair, the Singapore version (white bee hoon and yellow mee mix) was also generally good until the 2000s. The last palatable ones remaining that I can recommend is Beach Road (thin bee hoon dry style), Toa Payoh Lor. 5 and Bedok Interchange (thick bee hoon soggy style). All standards have fallen since the 80s and 90s days but still acceptably palatable.
The last best of the thick soggy style I've tasted was at a Serangoon coffeeshop near Balestier junction. The old man sat on a stool to fry. There were no successor. The Beach Road thin dry style is into 3rd generation.