I think that could work.
I also think that since one end is trapping air and presumably building up heat and the other end is ventilating the hot air out that the 2 ends are going to heat differently.
Which means you're going to want to be able to move location where the FB/throat is to balance the heat distribution so the temp is more even down the length of the grate.
Don't ask me how to move an entire FB/throat to "tune" the rig but I think that could be important.
I wonder if there's a way to calculate where the FB/throat should be….. hmmmmm