Link - what base engine is it? Volvo doesn't really make heads or marine engines, they typically use base GM engines so a head will suck to do but it shouldn't be hard to find one...
OK - maybe they do make a couple base marine engines - check with this guy on ebay
Gizzmoid@adelphia.net and do a seach on that engine with Ebay - he might have something - also do a google search on that engine - there are some things out there.
And check this link too:
http://www.customengine.com/classifi...s/00001b55.htm - lots of stuff out there if you look...