I agree if, it's solid otherwise I'd get it (pictures would help.) Here are some helpful links to do the head swap.
http://www.bmw2002faq.com/component/option,com_forum/Itemid,50/page,viewtopic/t,350584/
http://www.bmw2002faq.com/component/option,com_forum/Itemid,57/page,viewtopic/t,346414/highlight,head+swap/
http://www.bmw2002faq.com/component/option,com_forum/Itemid,50/page,viewtopic/t,365309/highlight,/