Your garage measures 19.5 ft, and the 198 hull alone measures 19'8".
So, I would say the 198 is out.

If your garage measures an exact 19.5 ft inside, it's going to be hard to get any baasboat over 18 ft. in it.

My Champion 183 measures, from tip of trailer tounge to tip of trimmed down outboard prop in rear, 23'2" in length.