I think the CIS fuel lines may have been upgraded at some point. My recollection is that there was the option for either plastic lines or hard-plumbed steel lines. Flex-covered lines like in the photos were common on Audi's in the mid-70's but I don't recall seeing those on 911's.
Motor mount washers may be upside down:
http://forums.pelicanparts.com/porsche-911-technical-forum/1027436-engine-mount-washers.html
It looks like you had stock exhaust with the EGR and the air injection. Both have been removed. You have the 3-into-1 manifolds that are installed where the thermal reactors would go. Like Harry said, if this was a native Canada car you probably didn't have those, but the presence of the EGR remnants make me think that thermal reactors were probably installed at one point.