need box design for 4 SA-15's

[02Blazer]

 i need a box design for 4 SA-15's , will be running it off an Orion XTR2500 , it's for a 2002 chevy s10 blazer , Joe X designed a box with the port going across the bottom , would like the same design (subs up, port back, tuned around 35 hz. 

my dimensions i'm working with are 37'' width 20-21'' height and hopefully depth is 50'' or less.

thanks so much

edit ; if the 4 Sa 15's dont work in that space , i will opt for 2 Sundown X 18's run off that same amp

[Joe X]

So here is a suggestion, power: to subs rated, amp subsonic filter to 28Hz, minimum port clearance 6", figure is just an assembly guide:

 

 

Any changes let me know.

[02Blazer]

that is exacyly what i was looking for !!!!! thanks so much , really appreciate it ?