i found a 427 tall deck with these numbers 473478 and just to the left, it has marine casted in it. it came from a heavy duty service truck with 85k on the odometer. hasnt ran for a while, but was running before the truck sat. id like to know what the complete engine is worth meaning what are most 427 tall deck blocks going for these days. also, did they all have marine casted in them or just a select few? i came up with nothing. thanks for any info.