Ok need some design advise for my 70

[dirtyd_nd]

Speakers under the seat are useless in my opinion. They fire forward the sound is going to bounce off of the front of the cab and mix with the front speakers messing up all the timing. If you want more than just a single stage set up take the time and put them about mid way up the cab corners. If you are going to build a sub box and kick panel why not take a little more time and put them where they will help your system instead of fighting it. Oh and as little room that there is in our trucks, I would just go with a really good single stage and sub. I have it that way in my 2000 extra cab Silverado and most cant' tell that I only have the one sub two 6.5 and two tweeters. You might be surprised by how good it can sound.
Dale