later model frame for a 67 gmc

[unreconstructed1]

hey ya'll, I just got a new 67 GMC project vehicle. manual steering, manual brakes, straight 6, 3 on the tree. I want to convert it to power steering/power brakes and put a bigger engine in it. my question : would it be easier to just put a later model frame underneath it theat has all the power steering and brakes, or would it be easier just to install each seperately? Im used to building camaros, so i dont know too much about these trucks, thought i'd give it a try. thanks for the help.