8 3/4 Donor

No disc brakes, yet. A friend just GAVE me a complete 383 and 727 that has changed my plans. I intended to pull the 318 and replace it with a 360 but you can't beat free. Every 8 3/4 I find for sale is across the country and shipping is outrageous. I wasn't sure if the 8 1/4 would be sufficient. Pretty new at this so I am going to need help.