When I finally get around to the interior of my project I am going to piece together an audio system using what I have laying around. So far I'll probably use an old Eclipse head unit, Q Forms with CDT Audio CL62 Pros in the kick panels, and some Boston Acoustics plate speakers in the 4X10 slots for some rear fill. I'm not going to drive a ton of power to the speakers at this point. The amps I have laying around are a Xtant 404M and a Hifonics Europa. Not sure which one I'll use and what signal processor (I do have a Coustic Xm5e crossover), but whatever it is it will be old school. 
Not now I'm debating on my sub setup. I can use either a single 10" JBL 1000GTi (the old style). or I also have a pair of 1st gen Rockford Fosgate Audiophile 10"s. All these subs require ported enclosures.
I'm leaning towards the JBL since it is my favorite sub. It has to be ported, so I'm thinking fire it backwards and port it into the rear deck. This sub seems to work best in a 2ft box tuned to 38-40Hz if I remember correctly.
If I go with the RF's I'd either have to face them both back and port them into the rear deck, or maybe go with some kind of Isobarik setup to keep the spirit of old school alive. These subs normally require a 1.2 - 1.4 ft box ported at 35Hz. I could make a .6-.7 rear ported chamber and make it so the second sub fires backwards. It would be very compact and those subs would be able to take some good power. They wouldn't be super efficient though. I had really good results taking cheap woofers and putting them in isobarik boxes back in the day.
Anyway, I'd like to get some opinions from the vetrans and please throw out some new ideas using the subs I have.
Thanks!

Not now I'm debating on my sub setup. I can use either a single 10" JBL 1000GTi (the old style). or I also have a pair of 1st gen Rockford Fosgate Audiophile 10"s. All these subs require ported enclosures.
I'm leaning towards the JBL since it is my favorite sub. It has to be ported, so I'm thinking fire it backwards and port it into the rear deck. This sub seems to work best in a 2ft box tuned to 38-40Hz if I remember correctly.
If I go with the RF's I'd either have to face them both back and port them into the rear deck, or maybe go with some kind of Isobarik setup to keep the spirit of old school alive. These subs normally require a 1.2 - 1.4 ft box ported at 35Hz. I could make a .6-.7 rear ported chamber and make it so the second sub fires backwards. It would be very compact and those subs would be able to take some good power. They wouldn't be super efficient though. I had really good results taking cheap woofers and putting them in isobarik boxes back in the day.
Anyway, I'd like to get some opinions from the vetrans and please throw out some new ideas using the subs I have.
Thanks!