What is a 410 FE block worth? bought it as a project years ago for $1500.00 came with a 30 over 428 crank and polished 427 rods has laid around disasembled. I was told these are mercury engines that were only made in 1966 and 1967, a friend told me these are binging $5000.00 now is this true? dgpalm@bresnan.net David