I am in the process of doing a heater core delete on my Z28. My question is, what should I use to plug the water pump where the heater hose went? I thought it might be threaded, so I planned to use a threaded pipe plug, like the kind you get from summit, however it isn't threaded. Has anyone done this before? What did you use?

 

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what I did was put a hose from the intake to the pump directly instead of looping through the heater core. without this setup i had lot of high temp fluctuations.

 

I just ended up getting fed up with hoses and put pipe plugs in the intake and water pump. Seems to have solved the problem

 

I would just loop the heater hoses together with a small piece of pipe, like you do with the TB bypass.