Our body supports are accurately reproduced in steel heavier than the original. Your original supports may be rusted out or "thinned" or sprung. Thus, your car may be too "flexible" to allow for proper door fit or proper structural rigidity. Installation of new supports is generally a very wise decision during any restoration.
Front
Driver and passenger sides shown below.
Middle
Driver and passenger sides shown below.
Rear
Driver and passenger sides shown below.