[V8] Heater Core Question

[Klein, Nathan P]

Hey y'all, 

My partially severed finger is pretty much healed, so I'm going to try
to find out what's up with the heater core this weekend.

I think this has already been answered, but I wanted to confirm before I
order the part:

Is the heater core on the V8 interchangeable with the 100?  Any other
VAG cross-compatibility?

There aren't many V8s down here (I've only seen one other in Dallas-Fort
Worth), so parts guys aren't too familiar with 'em.

Thanks!
Nathan