the 351 is in great conditions it just needs s little work like spark plugs, wires, oils, just the basic stuff... it runs great.!! and wen i took apart the 302 it already had been rebuilt, well at least that's what it looks like, the 351W is being sold to my by one of my good friends who is helping me restore my 1982 mustang gt.!! but he thinks that its better to put in the 351W but since i really dont know much about this stuff yet i dont know what to do. any advice any one??