I'm probably too late with this, but since you've got the other side still - Don't let the 'hips' of those quarters sink in on you when you cut the bottoms of them out. (ask me how I'm aware <eye-roll>)
Not sure I understand what you mean.
66 Impala (in progress)
56 stepside shortbed
55 Bel Air sedan
02 Monte Carlo (bought new)