I'd recommend you use the 1st one you linked that will enclose your fuse panel. You really should get that panel covered and protected. Fabricate a seat brace of some nature like Abbey pictured.
I understand not wanting to be NHRA legal COMPLETELY lol. Some, not all, is BS that is nitpicking over nothing of concern.
Regarding sound reduction, I see you have none of the factory insulation/crap whatever that sheet of stuff is behind the seat. FWIW, the factory stuff worked great and I'm sure you have noise that usually isn't there. Are you familiar with the factory jute padding thingy? It goes about 20-25lbs. My son left his out of his Cutlass and we had to take out the back seat and put it back in because it was so noisy in the car without it.
Edit : almost forgot to mention, I do see an issue back there, someone stole your Miller Lite and swapped it with some Busch Light smh 😉
I understand not wanting to be NHRA legal COMPLETELY lol. Some, not all, is BS that is nitpicking over nothing of concern.
Regarding sound reduction, I see you have none of the factory insulation/crap whatever that sheet of stuff is behind the seat. FWIW, the factory stuff worked great and I'm sure you have noise that usually isn't there. Are you familiar with the factory jute padding thingy? It goes about 20-25lbs. My son left his out of his Cutlass and we had to take out the back seat and put it back in because it was so noisy in the car without it.
Edit : almost forgot to mention, I do see an issue back there, someone stole your Miller Lite and swapped it with some Busch Light smh 😉