Do I need a 1" drop shackle with 4/6 drop?

[rs74]

I am putting on a 4/6 Western Chassis drop on my 85 short bed. I am using 2.5 drop spindles and 1.5 springs up front and their flip kit in the rear. I am in the process of replacing all the bushings in the leaf springs and shackles. I can not find a rubber replacement for the shackle. I don't want to spend the money for new shackles if I am going to need drop shackles.

I just don't know for those of you that have this drop if I will need the drop shackles to level the truck out. I am not sure how much rake it would have if I just put regular shackles back on it. I have already bought the bushings and didn't fit the shackle and now I am looking at buying stock replacement shackles only to see if I will need to buy drop shackles. Kind of like spending the money three times here for the same thing. What is you experiences with this drop and if or not you need or needed the drop shackles to level it out. If I don't get the drop shackle will it look that much different and stupid?