I have an 85 IROC that I am putting a carbed 350 in with a 5 speed transmission. I am debating whether to use 3.23 or 3.73 gears. The car will be a daily driver though it won't be driven much on highways above 55 mph. I currently have both sets of gears. The 3.23s are currently installed in the 85 disc rear end (with limited slip) I have while the 3.73s are in a drum rear end I have (with no limited slip). How hard would it be to swap the gears if I do decide to use the 3.73s? Any help/suggestions greatly appreciated.

I swapped out my 3.23's in favor of 3.73's for my carb'd 5 speed and never looked back. If you do alot of high speed freeway driving they might not be the best choice.

3.73s should be fun!! since you dont have to go on the highway go for it..

With a five speed I would definitely go with the 3.73's