Heater Core Question

[jbgroby]

In the picture below is an original heater core with a replacment new OEM thermatic control valve. I would like to consider keeping this as I would NOT have to modify the top of the heater box but cutting a larget hold on it (New core piping is not the same as OEM cores). but if prudance and common sense play a part I'm more than willing to change.

The new after market deluxe heater cores do not have this valve. If I'm not mistaken, some guys use the after market cores and simply put a on/off valve on the incoming line that would provide hot radiator fluid to the core when needed.

Does anyone else use a OEM set up? Or can you provide some pictures of how you rigged your up?

Thanks