Volvo 240 wagon, 225k mi

I need to replace the blower motor, and while I'm in there I figured I'd be ready to replace the heater core. I picked on up at IPD, but I'm not impressed.

I've removed the dash per Art's instructions. The 93 is pretty much the same, a few more screws. The heater core looks ok, but I know that can be deceiving.

https://www.icloud.com/sharedalbum/#B0eG5VpecbTlwL

Questions:

1. Is this the original style heater core? I've been told the original heater cores have plastic parts. Where is the plastic? I can only see coper and metal.

2. The hoses are beefy and solid - seemed to be wrapped in some pretty tough stuff - assume original too.

3. Thoughts on replacing the heater core and/or hoses? (I know - pay me now, or pay me later, but I'm not impressed with the heater cores I've found - the pipe ends move!)

Any advice is always appreciated.

Thanks.