Dart Rearend

Its a 318 with single piston front disc so yea,large bolt pattern. Id like to keep that bolt pattern. Im not planning on drag racing it or hot rodding it all over i just want it to be able to withstand some abuse if i decide i want to get on it. If i put in an 8 1/4 will i have to do anything to my driveshaft? Always hear of people shortening driveshafts but i feel like thats more of a transmission issue.