I hope this helps people in question. I did gusset the rear triangle on all 3 corners. I only pictured one or 2 that I welded in. Also the front end above the upper front a arm mount I gusseted that corner as well. I think I put a total of about 18 or more gussets all together. It didn't interfere with anything mechanical whatsoever.

I cut little template pieces out of cereal box cardboard first, it made the trimming and fitting very easy. Than I traced them out on my 1/8" steel plate and cut them out. Smoothed the sharp edges on the grinder and welded them up.

I also numbered them as I went along and numbered the frame. Lots of pieces were so close but slightly different.