Dual 12" HWK Car Question, hello 60 and down...

I have been requested to build a HWK for a friends Excursion,
How do I modify the cabinets dimensions, and ports?

Due to several factors I have not started my own HWK yet, however I do have everything including 4” and 6” hole saws and a new Jasper Jig. I also have all the wood and it’s partially cut. Looks like I am gonna use my materials to build his.

Now for drivers a pair of POLK AUDIO 12” MOMO’s?????
WADA YA THINK?????
Here is the website:
http://www.polkaudio.com/caraudio/products/mm2124/

Here is the manual:
http://www.polkaudio.com/downloads/manuals/car/MM_2_Subs_Manual.pdf

Let the fun begin,
Michael in Tampa

He is not going to answer until you get rid of that word.    "MODIFY"

I don't think 60 modified his, did he?

iirc, he built a hwk-12 and loaded it with 2 rl-p12's
he used a hwk-15 in his home.
just build the 'stock' hwk-12