Do I need frame connectors?

I bought the MP bolt-on frame connectors and finished the install yesterday. My buddy at the Ford dealership had a full roster Saturday so I had to do these at the house. Fortunately the weather has been great the last few days. Even though they were bolt-ons ,I decided to just weld them in, because after getting them lined up, I realized I would have to remove the mufflers to drill for the rear connection. The drivers side interfered with the emergency brake cable stop so that had to be removed and a new hole drilled just above the original. All together it only took a few hours to install the pair and OH what a difference. I was surprised how much more rigid the car feels, especially when you romp on it! I`m very pleased with this $105.00 modification. Now I`m thinking Tremec 5 speed? Hmmmm?