2007 Tacoma - Replacing coolant bypass pipe, anything else?

Hello,
I have a 2007 Tacoma, 4cyl, A/T, RWD with 130k miles. I bought it new and truck has lived in North Texas its whole life. I will soon be replacing the plastic coolant bypass pipe with a metal one and wondering if I should replace anything else will I have coolant drained and intake plenum removed. Thoughts?

Note I will replace intake and throttle body gaskets. In the last couple years I have replaced the easy-to-get-to vacuum tubing (preventative), thermostat (preventative) and water pump (leaking). Everything else is pretty much original including the coolant hoses.

Thanks!