[JSeery]

Originally Posted by drolston

No panhard bar on front or rear of a '41, making shackle angle important to safe handling.

With correct angled-in shackles, when the spring exerts an outward side force on the shackle, as in a turn away from that side of the car, the shackle must lift the car in moving outward. That opposing force counters roll and tends to keep the car centered over the axel.

With shackles vertical or angled outwards, side force in a turn will tend to lower the car on the outside of the turn, and increase movement of the body over the axel to the outside of the turn, resulting in less stable handling.

Long time ago, I put lowering shackles on the front of my '48 coupe, changing shackle angle to near vertical, and the front end handling got noticeably more squirrely. But it looked cool. Went back to stock shackles and put those big Goodyear Double Eagle whitewalls on the back to achieve the desired rake. Broke two axels and one drive shaft trying to lay rubber like it would with little tires.

For some reason I thought the 41s did have pan bars! You are correct the handling on a car with that shackle setup and no pan bar would be interesting at best.