About to start rear end swap... a few questions?

Fill it in the side plug until it is level with the hole you are filling it at. You will need different hand brake cables for the larger brakes. Advanced auto . You will also need to get 8 3/4 spring plates and u-bolts. Also depending on what size eyes ore on the springs you are getting , you will need the larger spring hangers front and rear. I have most parts you will need if you can't find them near you. Oh yeah your drive shaft will not work it will be to long . Steve