Tubo bypass valve
 

Hey everyone, Im from Australia. Had my '85 Saab 900 Turbo for about a year now, and im looking to fit a blow off or bypass valve, as the turbo has just been reconditioned. I was wondering if anybody knows where i would find an appropriate vacuum source for the application of one? Ive attached some pics if that helps

http://img365.imageshack.us/img365/5906/53tb.jpg
http://img362.imageshack.us/img362/585/16yt.jpg
http://img361.imageshack.us/img361/2935/28ta.jpg
http://img352.imageshack.us/img352/4365/39ub.jpg

Also, does anybody know what this is, or was for?
http://img364.imageshack.us/img364/164/6661rh.jpg

Any help at all would be greatly appreciated,
Thanks heaps :)

RE: Tubo bypass valve
 

any vacuum source behind the throttle body will provide proper vacuum to open the BOV.