I picked up a set of wiper arms from an 86 C10. They have the squirters built into the arms.
I am not sure if you bought the stuff from LMC, if they would clip onto the original arms of the 84 & older. I also like the better connector of the newer arms for holding on the wiper blades
Post 54 of my build shows what I did.
http://67-72chevytrucks.com/vboard/s...=754899&page=3