first before anything was lifted off the ground or cut i ran a 1inch pipe from left to right from inner rocker to inner rocker , then i had one going from the rocker up to the roof meets the window on the other side, did that to both sides it made and X with a line underneath it , you get what im saying, i used a laser lever behind the car to get it exactly level and to make sure it would stay level, after everyting was dropped like rear end and suspension, i took lots and lots of measure ments on where stuff was and how far apart they were, since i was replacing the trunk floor to that was all cleared out the way, i held the car up with jack stande and the very end of the rocker i used small metal shims to get it perfectly level, i installed the trunk floor first ibefore welding it in place i ran some bolts throught the back of it attaching it to the car to the original bumper bracket holes so that it would stay in its correct place and i held the front up with ratchet straps so i could adjust the height, there are slots underneath the trunk floor where the frame rails rest in, before welding the shock cross member to the frame rails i put the back part of the rail in its slot under the trunk and used a sheetmetal screw that i ran up through the rail and into the trunk so it would stay in its correct place then i got the frame rails in it correct poistion from my measure ment on the rocker panel and put 3 sheetmetal screw in the front part to secure it in its correct place, once i had that done on both side,(checking my levelness the entire time, i put the shock cross member and tack welded it in place from the bottom, then i unscrewed everything and welded the crossmember fully to the rails, i spray rubberized undercoating inside the channel of the rails and on top of the shock cross member once installed you will never be able to get to it to protect from rust ,make sure that the front section of the frame rails all the points that are supposed to touch the rocker are touching the rocker and not leaning one wayh or the other, there is pretty much a set groove in the trunk floor that the rails follow, once the cross member was welded up i put it back in the car with the screws to hold it in place, and welded the crap out of it, thats pretty much where i am now if you would like me to send you pics let me know, once everything was welded in i cut out the tubing that kept the car square
also i have never done this before i dont know if what i did was overkill or not but it just seemed easier to me because i did this all by myself, i would defently try to get some help but i also went to a 3 years school in auto body, collision and repair and have a degree in it,im only 24 years old but ive never restored an old car im kinda testing my skills because i know i can do it with some advice from people with stuf i dont know,