I have a 1968 pontiac firebird. I want to put in a different rearend. I have two to choose from: a ten bolt 8.5 inch out of a 1973 Nova, and a ten bolt 8.5 inch out of a 1978 Camaro. Which one would be easier to install? What gears should I use? I have a 327 Chevy motor that makes about 325 horsepower and a 2400 stall converter. Any help would be appreciated!