When stabilizing the dimension of the chassis to ensure proper panel fit only works when these dimensions stay stabilized after the build when the car is put into use. Putting additional weight into the car only provides a situation of static loading and will do nothing to address torsional loading of the chassis when in use. The torsional loading will be at 90% when the car is driven and static loading will be maybe at 10%. Dimensional information on the fitment has been inconsistent simply because of the torsional loading issues that the original chassis implimented on the outer body panels causing them to be moved out of dimensional correctness. As you will become aware and as it has been said the Austin Healey is one of the most difficult cars to be fitted together as a result of the chassis issues. Unfortunately the Austin Healey chassis was never a sound structure in its original format. I have seen many different attempts to try to reinforce the original chassis such as heavier inner sills reinforcement tubes placed within the main rails. Although many believe this has been a cure, I have never found any of these repiars successful.
If the structure is not any good, in my opinion I am afraid you are wasting your time.
Marty
If the structure is not any good, in my opinion I am afraid you are wasting your time.
Marty