Yes, they do
The 203's use an unique trans adapter, the 241 will require an adapter from a 205, 208, or 241 equipped auto Dodge.
The 727 output for the 203 will be too short for the 241, you'll have to get the right trans output for a 208 or 241 and install it in the 727.
About 1/2 down in this post you can see the difference in the 203 and 208/241/205 bolt pattern and shaft length difference:
http://ramchargercentral.com/technical-discussion/drill-205-6-bolt-pattern-to-203-adapter/http://www.pirate4x4.com/forum/dodge/1013227-swap-241-203-205-doubler.htmlhttp://ramchargercentral.com/technical-discussion/np-241-to-np-203-swap/http://ramchargercentral.com/technical-discussion/transfercase-swap!/Here is an image to show the difference 203 on the left 205 on the right:
