Frame notch / flip kit question

[texan1186]

Right now the back of my 82 is lowered a few inches with a shackle/ hanger combo, and i have to take care of some other things before i can bag the rear, so im just gonna flip it to get rid of the crazy rake ive got going on. Anyways , i have 6 inches of clearance between the rear end and the frame, if i flip the rear can i get away with a c notch or will i need to weld in some real notches? It is my only vehicle so its hard to get anything done when i have to drive it the next day. thanks