I have recently brought a Non-ped Whippet from the "Spirit of the Stag" camp. She is 11 weeks old and she sits, stays, understands box, she retreves to hand, is toilet trained indoors, even though she lives outside, recall is great and she is as game as(not hard as) my Bull/Greyhound pup at the moment who is 17 weeks old. So dumb I think not but as for stamina she will probably not be great but I dont think she will need to run that far to catch her prey and given enough breather inbetween runs I'll think she will be OK.
All in all I think a good cross for your Saluki x, good luck.