'70 Frame Concern
I recently purchased a front end rebuild kit for my '70 SS and to prepare for the install I put the car up on ramps and jack stands. I jacked the back of the car up with a floor jack under the rear end and placed ramps under the rear tires. I then moved to the front and put the jack under the front crossmember and raised the car high enough to put jack stands under the frame rails just below the door hinge area.
I lowered the car down until the frame was just sitting on the jack stands and stopped to be sure the car was sitting safely on the stands. The next thing that happened has me worried.
Since I thought all of the weight was sitting on the stands I turned the jack handle and the front crossmember (and I guess the whole front clip) dropped about an inch (I didn't measure it) with the jack. I then tried jacking the car back up. I can jack up the crosmember a small distance before the frame rails lift off of the jack stands. I also noticed my doors are binding with the fenders and are sticking when I try to open them. The gaps between the doors and fenders have never been perfect but they are pretty much closed up now.
Is there an acceptable amount of flex in these frames or should I be worried my frame is getting weak? There is no visible structural rust in the frame. Are there any areas where these frames are known to have trouble? I can move the jack stands forward about 6", would that help?
I am SLOWLY trying to get this car back on the road after 10+ years and finding out I have a bad frame would pretty much stop the project.
Any help you can give will be appreciated.
1970 SS396 Chevelle
468 ci, TH 400, 3:73 posi