FWIW, what you have pictured in the Ebay auction is not a shortblock. It is a long block. Short block is an engine without heads. Long block is an engine with heads. It also appears to have LA and not Magnum heads on it. Unless the block was drilled for LA oiling the heads will not get oil.......OR it is an LA 360 and not Magnum. From the intake valley, it appears to ba an LA 360 not a Magnum.
Did you mistakenly post pictures of your 340 in the auction?