Sub box pro reliable?

I’m planning on making a ported sub box for my 2 12” DB drive SPW DVC subs. They are 600rms each. I have looked all over to find a prefabbed box that will fit in my camaro but it is hopeless lol. Only 1 I have found and it is tuned too high for what I want. I bought a sealed setup but they aren’t cutting it. Need ported.
I have designed a box on sub box pro that I think will work as long as the program is correct. 30w by 14h by 16 deep. 6” aero port. 18” long. Tuning goal was 35hz. It is the sky high adjustable one. Has anyone used that program before and had good success? My current amp is a pioneer 800rms at 1 ohm. I relize it is a bit low for those but wanted to try it out and go from there. I am using a line out converter. Any input is much appreciated. Will be my first attempt at a box.
 
Sd = 517 cm²(+/-)
Vas = 108.5 L😎

You can use the same alignment from the pdf for SPD12D4:
Recommended Vented Box: 1.6 cu ft. (1.6ft³= 45.306L)
• Vent Area: 3” round vent (or 7.4 square inches)
• Vent Length: 18” long
• Tuning: 26 Hz
Link: SPW12D4 – DB Drive
Link: pdf
 

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