1968 to 1973 340 short block or long block

Just got back from the machine shop , where I was told to find another 340 block. So what I have is a 73 340 boat anchor I need to replace ! The last rebuilder forgot to install the internal rear oil gallery plug and the 2 front plugs !
Sooo anyone got or know of a rebuildable 340 short block that hasn't already been punched beyond 30 over on the pistons ?