Waheguru ji ka Khalsa Waheguru ji ki Fateh,
Imarried a girl of Walia family 30 years ago where as it was quite impossible to do so
at that time,to go ahead,for out of caste marriage.Caste is no bar for a Sikh but important is that your would be life partner should be preferably Amritdhari and would be couples nature, habbits and life style should also match with each other so that they can understand each other well and live in such a way that the forthcoming life may not be a compromise but an understandingful and submissive life .
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/hard-talk/8550-how-many-sikhs-have-married-out.html
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=8550
May Ibeg pardon if something wrong has been stated above.
Waheguru ji ka Khalsa Waheguru ji ki Fateh.