I pray that this thread doesn't turn into a small block versus big block thread.
Stentor is correct. There may not be a 427-bodied Kirkham with a 351-based engine. I'd have to look through the Shelby World Registry , since the Kirkhams are listed in it.
I'm sure there's somebody out there, but you must consider resale price since nearly all Kirkham buyers install an FE in their 427 S/C's or street models.
I go one further and say that aren't many 428's installed either.