Hello, I just bought a pair of jbl gto636 speakers and I cant seem to find any box plans for them. I am putting them in my 1965 chevy impala and refuse to cut holes in my door panels so I am going to tuck them up underneath the dash or modify the glovebox area, or something. What would be the optimal boxes for them? I have some 3/4 mdf left over from the sub box I built but fear that could be too thick and interfere with sound quality. Experienced advice is much appriciated. Thank you.