I used to do that almost everyday after school in my mom's 1970 Buick 455/TH400. That transmission never missed a lick and would send the old green bomb careening across the school parking lot. However, when I tried it in my sisters 1972 Hornet, the story ended a little different. That was also my first transmission swap, I'm lucky my dad didn't strangle me when he had to tow it home.