I need some help, the rear cleats on my 32 have a little movement and I'd like to tighten them up. I believe the only way to get to hold the nuts underneath would be to remove the rear vents and go through the small hole inside. Are these vents / grills held on with double sided tape, or some sort of velcro like the dash panel? Also getting ready to tackle replacing the spark plugs, how bad are the inner banks between the motors?

Thanks.