BO AUDIOMAN BORIS

hi Folks, I have 4 pairs of jbl K140. i would like to build 4 vented cabinets with on each 2 x k140 bass 1 x 2123h bas mid 1 x altec 808 a8 ALNICO + 511 horn high mid 1x 2402 ALNICO high 1x 2405 ALNICO super high. A friend of mine advised me a size of 364 litres ( L 110 cm x H 75 cm x D 44 cm ) inner volume. Concerning the duct, he told me that the best suitable duct dimension is Sd 180 cm² (L 21.4 cm x H 21.42 cm and 18 cm maximum Depth). Cross over (intertecnik/sprague/m cap supreme 18dB / way with Lpads (die cast aluminium resistors on 808a ; 2402 + 2405 + rotative attenuators on 808a ; 2402 + 2405. I would like to know i i have to/must align all the components from the emmisive part of the diaphragm / cones? Are the dimension of the box considering all the component? Is the duct mouth en length ok? Thank you all in advance for repliyng. Sorry for my poor English (Belgium). Regards Boris