Welcome to GTTalk!
A couple of tips
104s were gear drive. I'm guessing the hood was changed. Your tractor must be a 105 with 10 horse and hydrostat drive.. Could also be a 125 if 12 horsepower engine. Hydros use a lot of power so everyone uses gear drive tractors to pull. You can still have a ton of fun but that drive system won't be competitive.
Also, you have drastically altered your steering geometry by turning the front axle upside down. When pulling hard making the front end light, you will need both front tires working in unison.
I'm not a puller, just some things I noticed from your pictures.
Best of luck!
Here is a link filled with info on steering geometry
In looking again I see your tractor IS gear drive. I was seeing the chrome of the steering wheel spokes thinking it was a hydro lever.
Edited by Gtractor, October 23, 2014 - 07:18 PM.