K so I have just got a 1985 GMC Sierra, great shape. Been in a garage for 20 yrs Please Register or Log in to view images I want to make that thing shake and thats quite a task because its an older truck so its heavy haha. I need to know if theres a legit way to put subs in it. Theres no backseat. This is basically the interior. Please Register or Log in to view images Any ideas? Only place I see that might work would be right smack dab in the middle.