Yep, Whinger and Clevo mounts are interchangeable.

Both sets of mounts are different between small/big-blocks though. Pacemaker does a mounting kit for 429/460 into XD-XF along with a set of pipes, but being different bays you'd have to make up mounts for the body mounts to adapt them hahaha, so it's a bit of a redundancy... I will ask a mate who changed from a clevo to a 460 in a '56 and see if he had to change body mounts or not. That should sort you out