Here's a pic to help. I know you obviously know the differences or you wouldn't e asking, but for anyone whos wondering.
The German K98 is at the top, this particular one was captured and reissued by the Yugoslavs, so technically now its a Yugo mauser. Th bottom one is a VZ-24. I was a little off on my ideas of how to convert the Heller long mauser, instead of completely removing the bolt takedown disc in he buttstock, you'd have to fill it and add a unit disc in brass or steel, but some VZs don't have them at all.
The Heller Mauser does have the wood handguard that wraps around the rear sight like on the VZ.
You'll also need a straight bolt handle. Looking at my VZ I also see that the VZ can indeed have a holed nosecap, and my German/Yugo in fact has a solid nose cap, go figure.
My VZ is also mising the front sight protector, just a large set of "wings".
So, if it helps, here's a pic...