Frame connectors

My 65 had a couple tubes bolted to floor,and a couple welds on either end. I finished it off by welding to floor,braces to rockers and seat supports. Not real beefy but anything will help. I prefer to have my seats attatched to more than a couple layers of sheet metal. Rode in my buddy’s 69 dart 340/4 speed, no frame connectors. It flexes,i can feel it when he hammers on it. That car is pristine,and i dont think he wants to do it.