wiring for a vintage air setup

[leanburn]

ive installing a vintage air unit in my 74 cuda over the long weekend and have some questions on the wiring.
 first of all there are two grounds, one for the blower [ 12 gauge ] and one for the ecu [ 16 guage ] the directions say that they both have to hook to the neg battery post. i'm really trying to eliminate as many wire as possible so what would be the reasoning behind haveing to seperate grounds?
 second- where is the best spot to tie into '' dashlamp '' ?
 third- there is a power wire with a 30amp breaker that goes to the battery and of course it is about 10 feet long. i already have a seperate 10 gauge wire that i ran to a seperate fuse panel that i can use, my question is can i shorten the exsisting power wire and remove the 30 amp breaker when i hook to the fuse panel or should i keep the breaker?

wow, now that is a mouthfull!!!!!!!!

[Chryco Psycho]

the breaker will reset if htere is a problem so I would keep it in the circuit , you do not need to have a fuse in the cicuit with the braker though
the dash lighting is all orange , there is a triple plug above the raio or you could tie into the radio plug which is a 2 prong red & orange wired plug
 no reason to have 2 grounds , connect the 2 together & run it to ground

[leanburn]

wow, you actually were able to understand and answer that entire post, impressive.
 since i have you attention what does it mean to ''evacuate the system''.

another thing for anyone who want to install this kit i made a list of tips that the installation instructions left out. someone can learn from my mistakes.

[Chryco Psycho]

you clean out the system by evacuating it before filling it with oil & refrigerant

[ShelbyDogg]

EVACUATE the system means hooking up a vacuum pump to the closed system, then pulling a vacuum of at least 30lbs.  I leave mine hooked up sucking for about 20-30 minutes. I then turn off the pump and shut off the guage valves. I come back 30 minutes later and check to see if the vacuum is still there where I left it. If it is, that means no leaks, so I proceed to charge it with freon.        Moisture boils away in a vacuum. Any moisture left in your system can freeze, then plug it up. So suck it all out before charging it. You get more freon in it also. Don't even think about charging it before "evacuating" it.  Do not have the car running.......

I have a pump. For those of you that don't, our local AUTOZONE has one in their Loan-A-Tool group.

I added factory A/C to my non A/C R/T. My Cuda and Chally Vert also have A/C.  Now that I'm older, I don't like to be miserable when cruising around. I like to know that I have the option to hit a switch and be "too COLD"