Finally getting around to putting some tunes in my wife's 68 (non-AC). I've got all the parts on the way (head unit, amp, 6X9s in enclosures going behind the seats on the floor, amp kit, wires, and a super cool dual dash speaker replacement. Here's the million-dollar question for you cats that have done this/got the T-shirt. What are the steps to access/replace the dash speaker? Of course, I'll have the head unit and ash tray out to start... Will that be enough opening/access to get to the old dash speaker? Thank you. r/RJ