Eric102, I purchased KingKutter BB-48 $450 at local Farm Implement store 2 miles from house. It had some scratches on it and was an older blue model, I suspect it was used but the blades looked new and the mounting pins were pristine. A young man who works as mechanic there lives next door to me picked it up and delivered to me for free. I gave him $20 for the help.
I found the TL with the kit just barely made my blade level at its full extent. This was unusable, and dangerous cause the TL would invariably stress and fail at its full extent. Having not decided to do the Hyd TL yet, I purchased a 15"-19" manual TL. Since the kit requires a 5/8" ball at the tractor, I also had to purchase a 5/8 to 3/4 bushing, then I had to grind the shoulders off of the manual TL since the kit is 1" wide at the tractor.
So, I used the blade a bit, and realized how important a Hyd TL was. That is when I contacted Brian at fitrite. I will post pic when I am complete.
If my box blade ends up needing a longer manual top link I do have an extra one that could work with the modifications you noted until I get the hydraulic TL.
I went ahead and ordered the rear hydraulic kit a few days ago to get that part of the project completed.
What did Brian quote you for his TL?