Xtreme Mower Mayhem

I posted some pics of my Monster Mower build (seejayeight). Just getting started so pics are of pieces I am going to use. Engine will be a 20hp Kohler L-head. All parts free so far. Any tips or suggestions along the way appreciated. I was going to follow the build rules posted here. Any ideal dimension between frame and axle. Anyone have any steering pics?

thanks, Jay19LM