Up for auction is a rare vintage WEST BEND GO KART ENGINE BLOCK. Part # A129010. I was told by a helpful ebayer that this block is either a 510 or 580. Check the pictures closely, you be the judge. Hard to find item in NOS condition. This auction is for the block only, what you see is what you get, however there are other parts on auction that may apply to this unit. Happy bidding. You need this for your restoration, BUY it now or BID to win! Thanks for looking and God Bless.