Rear frame fabrication

[thomas45]

Hi guys I’m working on a 67' ChevII and I’m doing a custom 3 link on it. Im replacing the frame rails and adding a cross member to mount the links to. Now I have the x member and the frame rails tacked in. I was looking at the whole deal and it looks like I can drop the whole pig out. My question is: now that I have the rear rails and x member tacked and measured out for the car, can I remove the whole unit and complete it out of the car? Or should I just weld it up in the car? Some of the parts I need to get to and weld are very hard to reach, this would make it alot easier as you can imagin. Request assistance please

[MarkBall2]

Drop it out after you make meticulous measurements. Then make a jig to sit it on to counter all the warpage it's gonna have. Once you get it welded, take it loose from the jig & correct the warpage so it fits correctly.