your thought on my '65 rear suspension idea

[rickoner]

I'm looking for some thoughts on what I'm planning to do to the rear of my truck since there's a lot of really smart people on this forum. I'm bagging my '65 to lay frame. The front is already done and I've got the rear step notches in place. I also have a watts link that is yet to be installed. Now here is what I'm planning to do for the rest of it. The stock trailing arms are going to stay and I'm wanting to build a setup like the kp components cantilever setup around them. But unlike those setups, I'm wanting to put the arms with the bags towards the front of the truck. The thing that I'm most concerned with is what kind of stress is that going to do to the frame. I'm going to want to use the truck to tow/haul with occasionally and don't want to taco the frame all up.

What's your thoughts? Should I be fine or should I rethink everything?