18" RD Alpha in 4th order Design help

[Savag3]

Im thinking about a 4th order bp with the woofer facing up into a sealed chamber and the bottom chamber ported thru cab . Max Dimensions are 15"Hx38Wx?D (truck bed) Lemme know wut u got ? if you want fee PM me

[Savag3]

someone ?

[galacticmonkey]

Wont be optimum with the sub facing up since it cant face foward.

[Savag3]

I cant see any other way to fit it