I have a '64 Biscayne with a 413 stroker four speed and I just installed a Moser 9 inch. I'm running a one piece driveshaft that worked fine with the stock rearend, but the pinion on the 9 inch is about an inch and a half lower than stock. The problem I'm having is this, I can not install the driveshaft because it's hitting the bottom of the tunnel in the frame. The car sits 3 inches higher than stock ride height and I love the stance so I don't want to lower the car even though I know that would fix my problem. Can I cut the frame safely if I box it back in? Open for suggestions. Thanks