For those with Magnums - What Mounts did you use?

If you have a small block k-frame, you simply order correct mounts for your application, same as if it was an LA engine.
If you have a six cylinder k-frame, you can order the correct conversion mounts.
If you are replacing the k-frame, just order the correct LA style mounts for whatever application that k-frame was originally from.

So I’m having some “finding” issues...
everywhere I’ve checked (parts stores) list only 318 mounts. (same part number 360-318)
I don’t want to order from RAuto because they will charge shipping to return if wrong.
None of them list 340 mounts at all or they cross to 318 part numbers also.

Would you or anyone else have part numbers by chance? Or a reliable source?