hawkeye
That is a great looking truck. I envie you doing a father daughter project. Neither of my kids wants anything to do with my truck except go for rides.
I did a 53 3600. Yes the parts are a little more rare and the cost is a little higher. I found everything I needed at my Flaps, LMC. Classic Truck and found some very resonable parts at swap meets and online bone yards. You can do it. I finished my truck this tear. I would not trade my 3/4 ton for a 1/2 ton any day.
See the pics in my link below, and best fo luck to you and your daughter!
RB53