I've done a few over the years but always stuck with the SBF. Rust is the biggest killer in these builds for sure. Get some good spot weld cutters and be sure to seam seal everything once its all back together. Looks fun though. The lift will actually help with your driveline angles, they are already short with the C4 so the extra distance is nice. Helps to cut the ends off the axles and rotate them a bit front and rear. Good luck!