82 D350 318 to 12v swap
 

So I just bought this truck to eventually swap a 12v in to it. Its an club cab 1982 D350 with the 318 gas, it has airbags on front suspension, 99k Miles.

I have been looking and looking for people that have done this conversion with this old of a first gen, and i cant find much. Can anyone point me in the right direction or help me find the parts i will need to make this as easy as possible? Any input is greatly appreciated!