Blow through build

[VarinaBassing 1]

I am tryin to build a blow through for my truck. I was wondering that if i build a simple ported box and then cut the hole for the subs and port to come through do i add that in to port calculator ? I thiking seriously about nightshade 18s I was thinking 5 cubes per sub tuned to 35 htz.. Any advice on the best way to go about the blow through

[ssh 924]

What vehicle, how many drivers?

[Kanaworm$ 292]

I would say yes, but not sure though since I have never built a blow through!

There is a build with a blow through in the build logs sections with 4 18". I believe that is a 4th order bandpass build.

[VarinaBassing 1]

Its a chevy 1500 Single Cab and i putting 2 18s in the back

[BanginGMC 23]

Do my idea!