The tape is for sealing where you cut your HVAC box and ruin it. I had a customer who used that, omg worst ever.
Considering how easy it is to pull the dash and HVAC box out of a dodge ram... no need for that.
5 maybe 6 electrical plugs about 24 bolts/screws and the entire dash comes out.
The only time it's ever a problem is when someone has an aftermarket stereo and didn't know how easy the dash was to pull out and they ran the wires all crazy through the dash.
I honestly suggest pulling the dash and replacing ALL the doors with the new ones with metal ends. do all the actuators, replace all the seals, and use the opportunity to clean the heater core and evaporator. it makes a massive difference in air volume and temperature.
The only downside, to pull the HVAC box all the way out, you need to unhook the heater core and AC system, so if you don't have a friend with some 134a tools, or a shop that will evacuate and refill the AC system on the cheap it can be a burden that way.
To give you an idea... one of these is a dodge RAM.... the other is a toyota.... I would rather do a Dodge RAM.