I could see just the first pic and liked what i saw - the frame has some graceful curves that you want to capture and present to folks. The hardpart is doing it right. i have no problem with parallel leaf springs up front but it'll take some sophisticated work to pull it off to make things look right and get the frontend on the ground.
Rear parallels would depend on how much or little of a bed you plan to have because most popular rpu's beds are too short to accomodate parallel leaf springs because the bed has to be so long it just screws the proportions up. If you are a modern kind of guy i would suggest coilovers for the rear.
If this is your first build i would put a model 'a' ford front crossmember up front and use all 'off the shelf' stuff and that will make your life so much easier, it'll have the 'look' and all your engineering is done from which spindle to the brakes to the steering etc it'll be just a question of who makes the best of each product and picking out what you need.