you have to do a little miling.
basically making the area the mag sets in a little wider and taller also a little frontward.
the bullet guide needs switch as well.
if you have access to a mill and some carbide slot cutters 1/2 or 3/4" diameter youre all set.
nice to have a 74 trunnion in your hand to copy though.
edit: should mention the akm chamber journal unless you get a late 70s izzy will be 23mm