The live Contortions stuff is much more interesting than the James Chance/James White studio LPs. I think Stella was Lydia but I can't remember - probably.
Yeah, the Rough Trade version of Blood's record is mixed like a UK post-punk LP - they also put out the Swell Maps, who were a great band, very open in their persuasions.
Of course, the UK post-punk/DIY scene and the DIY improvisation scene rubbed elbows a fair amount - Steve Beresford dated one of the Slits, Viv Albertine, and played on some of their post-Cut recordings.