waterpump question

[cole]

I'm going to change my water pump this weekend, (it's leaking through the weephole) so I ordered one. I was reading the instructions and it talked about internal and external bypassing. It said trucks are external and corvetts and passenger cars are internal. There is a 3/8 plug to insert into the hole for externally bypassed pumps. The problem I have is, there is no bypass hose on my water pump. Does that mean I have a car engine with internal bypassing? Or did someone change some other parts which left my engine without the ability to bypass. I am told, that if your engine cannot bypass in case of a stuck thermostat, it could cause damage. Does anyone know about this?

Thanks, Cole