Auto body repair & detailing: 1969 Olds Frame Repair, center crossmember, radiator support

Question
I'm restoring a 69 442 convertible and the car has a damaged front center crossmember.  The crossmember struck something at one time and pushed it up.  There are several buckles on top too where the engine mount brackets bolt in place.  Additionally, the mounting points for the front bolt on the lower control arms are off by about a half inch.  I would like to replace the front stub.  I've seen this done before and want to know if a hardtop front frame section is the same.  Can you advise and also offer any other input.  I don't believe the frame could be repaired cleanly enough for the type of restoration it will receive.
Thank you.

Answer
To section the entire front torque box assembly is going to be difficult, and even if you do replace it, the old frame must be pulled back out. You see, damage has transferred front the front area, completely through the vehicle. There is surely more tweaking. If you cut the frame apart without pulling the damaged area first, you are really looking at having serious problems fitting everything up. You also probably don't have access to frame gauges, and that will make getting the front section welded in at the proper height a problem. Too low, and the bumper will hang too low, and the radiator support will need shimmed up. Too high, and you are REALLY screwed. The fenders will be crowded up at the top of the doors and cowl, and the gap at the bottom of the fenders will be big enough to throw a cat through. You need professional help to section the frame. I would replace the frame, if at all possible. If this turns out to be impossible, take it to a body shop with a drive on frame rack, and see if they can repair the frame. If you are planning a frame off restoration, and you have access to another frame, why chop up 2 frames? You might be able to modify another frame for the convertible, if the wheel base and mounting points for the chassis are the same. I don't know if the frame from a 2 door sedan is the same for sure, you will need to consult a classic Oldsmobile expert to be sure. The convertible frame is completely boxed in under the passenger compartment, from the front torque box area of the frame to the rear torque box. On a regular sedan, the frame is a U channel. All you have to do to box it in, is add a steel plate to the back side of the frame. I think a plate may even be available from year one. I would section  a front frame section in as a last resort, and pay a professional to do the work. Be sure they are I-car certified in body on frame structural repair, or ASE certified in structural repair. GM certification in body on frame repair is just as good, perhaps better than the aforementioned. Bill