I've been happy with this film (Arista .EDU Ultra/Fomapan 400; I think I was shooting the Arista flavour, but everyone seems to agree they're identical) in HC-110 (dil B, 7 minutes at about 70 F, per the MDC). 9 minutes seems really long, especially at 75 F! Are you trying for unusually high contrast?
It has a reputation for being slower in practice than its ISO rating, but while I haven't done rigorous testing, I've been happy with it at 400 with this development regime. While it *is* an older emulsion, it doesn't have as much of a distinct "look" to my eye as, say, Fomapan 100---I don't think you'll get anything with a specifically "retro" character just by using this film. (I wouldn't say HC-110 is a particularly "old-style" developer, either; it's a fairly modern PQ acutance developer.)
It'd be interesting to try this film in Caffenol. I'd expect monstrous grain (hence really best to do it in MF rather than 35mm) and extreme sharpness, but I have no idea what the tonality would do...
-NT