Ok my first thought was to build an actual box that went down in here...
But I quickly scratched that idea...
Instead I am making a plate that will seal down against the metal well... Plate will get line-x on it when I get some other stuff done... and then a rubber skirt that seals well... the holes will get some serious cleaning and lots of dynamat and fiberfill... I already have a pair of Rockford Fosgate Punch stage 1 8" subs and a 300watt Blau amp that Bell recommended....
Picture of one of my templates... Now I need some HDF(High density fiberboard) and some time with a jig saw or a ROTOZIP..... I'm getting excited...