mighty max motor help

i am going to buy a 90 mitsu mighty max for a project truck, and the head is blown... how should i go about fixing this? new head? new engine? what other engines could i swap in (i.e eclipse motor)? there are no junkyards around here that have imports so i'll have to get it off the internet or order it, i'm looking at whatevers cheaper and most reliable. how much would a new engine installed cost? or just a new/used head?

thanks,chuck