i have a 1977 chevy truck, 454 with a 400 trans and a 12bolt diff, in the throws of a ground up rebuild, and some one suggested a one piece drive shaft would be better and stronger than the standadr setup, can anyone tell me if this is right? also removing the a/c but keeping the heater which means i need to cut the two separate so the fan remains and cap the cut does this sound right or is there a better way?