4 xPeerless by Tymphany NE315W-08 in Sealed Box

Hi Everyone

I'm building woofers section for my Line Arrays Towers.
Towers are 78" Tall with Left and Right Design with drivers per channel:
16 x Tang Band W4-1757SB 4" Aluminum Cone Driver
20 x Bohlender Graebener Neo3-PDR Planar Tweeter Open Back

Passive crossover 200/3000Hz

The woofers section will have 2 cabinets per channel with 2 Peerless NE315W-08 in one box. Sealed 4 CuFt (2 CuFt per woofer ) should give me F3 around 40Hz

I'm asking how you will design the woofers section for those Towers?
Same high means build 2 cabinets 39 inch long, or 2 cabinets 30 inch long and dont care for high match?