Looking for some help w/ dropping my 70

[squirrel]

I have a 1970 C-10 long bed and Im looking to drop it down a bit. I was thinking a 2/4 drop but I'm not sure. I'm getting ready to purchase some wheels (18's) and was not sure how much wheel well will be left after the drop. Does anyone have any pictures of a 2/4 drop. or could point me in the right direction. I want to have a smooth ride still but not so much of the 4 wheel drive look. Thanks for any help. Here is a picture of what I'm working with now.