You are correct that 454's are different with the size of the u-joints. But stick or auto does not matter. The only differance found on the stick and auto shafts are the length of the bottle neck length. Which is hardly visable, maybe an inch. Both shafts are the same length. I would love to find an orig. 454 shaft but will settle for something close or i'am going to buy an aftermarket shaft. The car is a frame off restored car that will be a driver the other car has its orig. shaft (thank god).
Thanks again guys.

The "MOF"