I've done probably 50 plus floor jobs and dozens of rockers and frame repairs. When I put the car on stands I can't really open the drivers door so I know there's some flex going on. I don't really want to swap frame rails, I'm just gonna weld them up.
Are you putting jack stands under the front of the rocker also or just the front of the car. If you are not putting a set under the rockers it will cause flex and the door not to open.
