Enclosure for my set up

[btdickey99]

I am looking into building an enclosure for my system out of fiberglass, and was wondering what the best specs and designs would be?

I am looking for a daily driver that I can compete for SPL. So about a 60/40 split.

I also amd do this ported, and the subs I have are 2 Memphis M3 12s, on 2 JL 500/1.

Thanks for all help, this is my first fiberglass ut second box build. My current subs are in a Memphis prefab box which works really well

Thanks

[btdickey99]

any ideas/help?