If your 41 Chrysler still has the original frame and suspension intact, you may be farther ahead to update what you already have.

The frame already fits you car, and the boxed frame is plenty strong enough to handle nearly any drive train you want to add. The original flathead 6 is nearly as heavy as a Mopar big block, and the Chrysler flathead 8 weighs more then the big block.

The Chrysler front suspension was light years ahead of the competition in suspension development in the late 30s and early 40s. The independent front suspension is a very good design that works very well with a few minor adjustments. They are easy to rebuild, and parts are readily available.

Several companies offer a disc brake conversion. A disc brake conversion is probably cheaper then rebuilding the original brakes. The original brakes were hard to properly adjust.

Several companies offer rack and pinion power steering for your car (frame attaching points are the same location on the frame as they are on the 46-48 Plymouth & Dodge, a search on this web site of the "46-48 Plymouth" will provide hours of reading and most of that info will transfer to your 41 Chrysler.

The original shocks mount between the upper and the lower control arms. That gives a nice pillow smooth ride, but brackets are available to relocate the upper shock mount to the frame. That brings the ride and handling up to modern standards. An upgrade to a Jeep front sway bar over an existing or a non-existing original sway bar is another easy and wonderful upgrade.

Food for thought. Gene