I agree with LONGBOX55, I've owned several Astro's and they only have a front sub frame. There appears to be a full length channel frame but is part of the body and cannot be removed like truck frame. I'm in the process of putting an S-10 frame under a 50 chevy truck and it will need spacers on the front wheels to make it look right. My brother and his son are building a 57 GMC and are using a full size 70's chevy truck frame and it fits great. No spacers etc.
