Newbie To Trucks Needs A Little Help!

[GMC"ER]

Hello all I am completely new to the truck scene and I didn't know where to post my question? As I stated I just bought my first truck it is a 1969 GMC stepside that has had some work already done to it. It is a V8 Automatic the truck had been a driver until the previous owner started a amateur restoration job on it. He had removed the cab and bed and redone the chassis and fixed most things on the truck removed all rusted parts with new parts and painted it. Has a Locar floor shifter and the interior has been basically redone. New tires with black wagon rims with an extra set of 8" factory rallies but not on the truck yet. Plus the truck runs great! He lost interest in it and sold it to me needs basic things done to make it a driver again. I am a Ford Model a guy (oops! wrong brand for here!) so I need some help. I want to lower it without spending a ton of money on it as I had to give 2500.00 for it as it sits and I really didn't know if that was a good price or not hope I didn't get burnt? I have researched here and on line and I want to keep my drum brakes and use DJM brand 3" front lowering springs and DJM brand 5" rear leaf flip kit with new shorter shocks will this make the truck set and look right as I think that a pickup sets about 2" higher in the rear standard? I am not really concerned with a real great ride as it will only be driven every once in a while and I am use to drum brake as the Model A has mechanical brakes on it just a step above a go-cart! I just want to know if this will work with the springs and flip kit and keep my drum setup and make the truck have the right stance? Thanks for the help Sorry for being so long winded! Also here are a few pictures and sorry but I could not help showing off the Model A it was my first antique vehicle until now the GMC. Thanks from East Tennessee, Robert