Transmission/shifter questions. 73 dart sport

Hi all,

I need help figuring out my transmission shifter. My car came from the factory with the floor console (that I don't have) but the brackets for it are still there. The car used to have a 440 in it (was a drag car) but now has a 318 from who knows what. It came from the factory with a slant 6. The transmission is a 904 but I have no idea if it is the original one. The shifter is not original and is junk. It is a B+M shifter. It looks like they just slaped it on the floor board with some metal screws. So, I need to get a new factory shifter. Anyone know where I can get one. I like real basic factory looking shifters. Also does anyone know what the hole in the floorboard by the shifter was for? I am assuming that the car came as an automatic, but I am not sure. Since my car is not totally original ( has a roll cage, fuel cell and holes cut out of the fender wells for the header pipes from the 440) I have been thinking about upgrading the transmission to a 5-speed with OD. But I don't have any welding or fabricating skills. So if it was not a simple bolt on project, I would have to have a shop do all of it :happy2: Also, does anyone know if this is the original steering column? I can get more pictures if you guys/gals need :toothy8:
:happy1: