How to Replace the Coolant Bypass Elbow on a GM 3800 / 3.8L Engine.

Replacing the coolant heater thermostat bypass elbow pipe due to it leaking. The OEM are plastic and Dorman makes an aluminum set.
Dorman 47065HP heater connector bypass        
https://amzn.to/3D870lR
NEIKO 00295A 3/8" Drive Locking Extension Bar Set    
https://amzn.to/3l8k3Mo
OIMERRY 28PCS Coolant System Pressure Tester          
https://amzn.to/3F8kcaZ
Ingersoll Rand 1207MAX-D3 3/8” Drive Air Ratchet      
https://amzn.to/3FcGloF
GEARWRENCH 20 Piece SAE/Metric Wrench Set - 35720A-02  
https://amzn.to/3F8kUFb
Pistol Grip Needle Nose Pliers    
https://amzn.to/3HhLwoU
LED Work Light, Lmaytech COB Rechargeable Work Lights  
https://amzn.to/3C5WYjF