magnum factory exhaust sizes question

Hey guys
Does anyone know it a set of block huggers for a LA 360 will be ok for a magnum? I think the LA verse magnum gaskets are different so not sure if the ports match up?
I know that a '69 318 has smaller exhaust ports than a late 70s or early 80s motor. I don't think that magnum or non-magnum is a factor. I think Mopar changed the exhaust port design before the magnum engine went into production??

treblig