That link is actually Jacob (the owner of Sundown), but I had a VERY similar box in my CRX with (4) SA'8 that did 153.8 officially at a show in stock 0-600w class.
To say that CRX style boxes work in a CRX is an understatement. Lol. I bet the first guy who tried subs forward port back shit himself.
If your car has a similary shaped cabin, I'd say it's definitely worth tesing for SPL, but I can't tell you whether that orientation would be good for daily listening.
More fun in the CRX...
Got a 5 gallon bucket?
Another win for Sundown.