Hello Make Them Die Slowly The Danish copy is only the 90 minute version of the film.
From IMDB It's official. Melinda McDowell has confirmed it and I (Critical_Beatdown IMDB) e-mailed Synapse Films' president Don May, Jr. to ask him what's happening and he replied, "Yes, it is true we are releasing THUNDERCRACK! We are working on the restoration and audio right now."
it's coming out in October though
From Wikipedia Because of its graphic sex including masturbation, heterosexual and homosexual couplings, the film is unavailable in many areas of the world.[8] It is, however, available on DVD in parts of Europe. Synapse-Films is working closely with the director’s sister and THUNDERCRACK! Actress, Melinda McDowell for a 35th anniversay DVD edition due in 2010.
The SYNAPSE-FILMS DVD release of thundercrack will BE the FULL UNCUT 153 or 158 minutes (Not sure on the correct running time) film
Here is the Link to the Thundercrack site
http://www.thundercrackthefilm.com/