Eliminating AC & connecting heater only on a Slant six

Right now Im trying to finsh building my '74 Plymouth Scamp which is mostly alot of small pieces. I decided to tackle the AC/Heater box unit since its in the way of my wiring. I don't want the AC portion back in my car so i took it apart and now only have the heater portion back on the car.

Now my question is :

do i need to take the heater resistor out of the AC box?
what does it do exactly?
where would it go?
can I eliminate any unnecessary wires /rubber air hoses?



I think the green wire goes connected to the blower motor but
I found a blue wire and was wondering what is its function?

here are some pictures, I hope my pictures help.