I purchased a 80 chev pickup a while back and is now in the autobody shop being professionally restored and will be out asap and i am puting in a kenwood stereo in and i wanted to know how large of speakers will fit behind the seat. i am looking to put a couple speakers and a sub or two. any replies would be appreciated.

 

if you want to stand them up i custom made a wooden that fit a 12 inch sub and it worked fine for me

 

I'm making my own speaker boxes to accommodate a couple of 10" speakers in my 57 Chev
Here is a pic from another forum of a speaker box in a 86 Chev