Issues with 360 engine mounts
Did not read the full post here. But you have a K-Frame that is originally for a 318 V8.
360 has differnt engine mount tabs than the 318s on the blocks.
Look up 318 engine mount brackets and compare them to the mounts the guy sent you. Can check on e-bay.
Sounds like wrong mounts to go with a 360 on the 318 K-Frame.
Ask
@Princess Valiant she is pretty good at this, she put a 360 in her A Body
Moparmat2000 is good too..