First Kitbash attempt....A Limo

I'm getting married this fall and I reserved a limo for the wedding, and I got inspired. I'm going to attempt to build a limo. I've been looking at my LHS for a suitable car. I'll probably go for a caddy or a lincoln town car. Any one ever done this before? I plan on buying two regular cars and then I'll cut up the bodies to make it long. I might call the limo place again and ask if I can take pictures for reference and insparation for the interior. So, any thoughts, idea's or helpful tips from those who have tried something similar would be greatly appreciated. Thanks!