I have the front end off the car right now and have a question. If I jack the car up under the subframe where it mounts under the seat, the front end of the subframe seems to droop a little before it raises with the rest of the car. In other words, the jacking point becomes like the "pivot point" between the front and the rear of the car. Now, I know this sounds plain stupid, but should the very front of the subframe raise at exactly the same time as the rear part of the sub, or does the weight of the suspension cause this to happen? I just want to be sure that once I have the car fully assembled, that if I jack it up in this same spot (should I ever need to) that my car isn't going to flex and cause damage to the sheetmetal.

I know this is absolutely a ridiculous question, but it seemed odd to me that with only the front suspension on, that the frame would flex this much. It isn't huge, and probably seems worse than it is. Is it the rubber body bushing that cause this?

Signed: Yes, I said my last dumb question was my last.

sounds like body bushing...but can cause body damage if flexing 2 much. i recommend checking the bolts that attaches the front frame to the body and see if the body bushings are dry rotted or cracked. this probably be a good time to just upgrade to unrathane

I'm not an expert but I know on unibody cars you gain strength from an entire assembly body,helps frame helps body.I'm not disagreeing with 67stang and i would check the bushings for sure,but if you got the front clip off it,I think it could be flexing more than normal.you probably should contact JIMM,CAMARO DAVE or LARGER DAVE those guys are pretty good at stuff like this

Yep that sounds like a rotted body bushing. The way I changed them was I supported the subframe holding it level and in place. Unbolted the four bolts that connect it to the body and raised the body with a 2.4 bridged across the body between the subframe. It was about a one hour job, and I was by myself.

The front fenders were off and there was no engine or trans in at the time because I was in a rebuild phase.

Yes it will flex a small amount and will not efffect the sheet metal.Even brand new, but like said ,not to much or you have a problem.

Even with new bushings, it will move some under those conditions. With all the sheetmetal on and bolted solid it will stiffen up a lot

Thank you guys. The bushings are brand new. I am finishing the brake bleeding tomorrow, and then the motor is going in. I had a painter come over today and work up an estimate. It goes in for paint at the end of April. I just did not want to put the rest of it together without asking. Thank you again.