Engineering-ish Question

Heres the issue; Ive got a huge transmission in a small space, specifically the footwell. On the LH side there are 2 designs, one follows the contour of the transmission netting about 1" of foot space along with 1" of thigh/ seat space, the other is simpler and I’m assuming stronger. Is the leftmost design viable or at least workable? If so, how?

Here is a rough idea of what I’m thinking sans the cross supports, it looks fairly weak and unnecessarily heavy. Currently there is 9.5" of foot space and at most 16.5" of seat space, going with the simpler design could push seat space down an inch.

Any ideas appreciated.