just unbolt the front cross member and swap it out.....that way you get everything with having to piecemeal it.....on the rear end, remember that it is wider than the 68 rear end....so if you have wheel selected make sure they will fit your application....if you want to stick to the 68 rear, ECE makes the 5 lug conversion axles....Have fun with it and enjoy your build!
Also, take some time and read through this thread for your conversion....
http://67-72chevytrucks.com/vboard/s...d.php?t=444823