Forget the POS B tank, may as well carry map gas like mark said. Oxy acetylene is all youll need.
A good micron gauge.
The 3 cfm pump will work but I prefer the 6.
I gotta have my fan blade and blower puller.
Youll need ductwork tools. Crimper, hand brake, strap tensioner, etc.
Not familiar with your temperature equipment but think its a gun? I dont trust a gun for suction and temp line readings. I like my fieldpiece clampmeter which i have the bulb type temp probe and my pipe clamp probe.
Nitrogen tank and regulator.