My new old truck! Suspension????

[71rustpile]

Hello,
Been lurking on this site for a couple of weeks now doing some research before I made a purchase. Finally pulled the trigger on Saturday and picked up this jem in Yukon, Oklahoma.
I plan on rebuilding the 350 thats in it now and changing out the 4 speed to an automatic. I also plan on making the interior look nice but leave the body the way it is with the nice patina.
My question for you guys is what should I do for suspension? I plan on running 22's maybe 20's and want it slammed so I have a little tire tuck in the fenders. I would like to do this on a budget so I don't want to drop 5k for an Air Ride Technologies setup. I just want the truck to sit low all the time. So any recommendations on what I need to do with the suspension setup would be greatly appreciated!