'74 swinger project

Soooo...with the addition of the cage (tied to the front frame rails, rear frame rails), subframe connectors, new tubular core support and a new trans crossmember for the T56...

Haven't fabbed up a replacement over-the-top of the transmission brace yet. Right now the replacement tunnel is a nice clean curved shape with only a hole for the shifter and soon one for e-brake cables. Given all of the other additions is it still mandatory to put something back ? I know it's purpose was to prevent floor pan flexing with the original uni-body design.