1968 340 block in 73 a body k member

Guys, I goofed and forgot to mention yesterday that my 340 block is a 1968, I don't want to do any k member mods or exchanges. Are there any kits that will allow this to happen. My engine guy still has the block, so I dont know what it looks like near the mount threads. I'm assuming its different. Pls help and thanks

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Author: kfrese