"I would notch the frame a little....."
Depending on what he means by that, it could be a disaster waiting to happen. If he's talking about shaving a little depth off the lower flange for shock clearance, that might be feasible, with correct taper, and possibly a reinforcement, but I'd be careful. There's got to be a better way than cutting the frame up, like extending the shock mount point to below the frame flange. That might require slightly shorter shocks, but would be a better solution, IMO.
