[dsraven]

check out canadian hotrods in Tappan BC. they make a great looking chassis with corvette suspension and GMparts. looks really nice in person. kinda pricey but your USD is worth more than our CAD. maybe get some good ideas if nothing else.
advanceddesign is right, tack it then assemble it then install front fenders with wheels and tire size you want on the truck. different tire sizes and different drop height make the wheels look like they are too far back if using the stock axle centreline. this is because the rear of the fender opening is tapered/angled while the front is not. the more you drop the truck the more the wheels/tires look like they are stuffed into the rear of the fender opening. could cause issues with rubbing as well I suppose. I moved mine ahead an inch but due to issues with my crossmember I am not sure how much drop I actually have. TCI MII crossmember with 2" drop spindles but after that it is a guessing game. I had to modify my cossmember to fit. maybe dropped another 1/2". tires/wheels are 235/75r15 from an S10, pink stringkine is ground level below tires.