Knowledge of quadrasteers needed

Hello all! I have an ‘03 Chevy 1500 with the 5.3 motor and quadrasteer, and it has only 70k miles. My question is, are the quadrasteer and non-quadrasteer frames different, or are they the same? This truck was my grandpa’s, and I bought it from him. He drove it during winter and parked it for about 4 years. Unfortunately, the salt has eaten away at the frame, and there are lots of brittle spots. I’d like to put a new frame on it. If anyone has knowledge about the frame differences, I’d love your input. Thanks in advance!

Zara said:
From what I remember as a GM tech, the frame is the same. The axle is longer due to the steering knuckles, and they also extended the bed sides for the same reason.

Okay! Maybe different mounting points? If you don’t mind me asking, did you work on a lot of them or just a few?

All I know is that it seems to have some dang good-looking rockers for having that bad of frame rust.