66 dart gt convert resto

I just bought a 741 case third member off ebay. I had the guy go through it and put a new pinion seal in it and set the back lash and stuff (sorry dont know much about rearends). Its only a 2.93 gear, but i wanted to try this gear ratio out with a 4 speed to see how i liked it. It doesnt have suregrip, but it was fare priced. I figure ill try it out, and if i like the 2.93 gear ratio, ill put suregrip on it later, but if I dont like it, Ill just get a new third member built with suregrip later after ive had my car on the road for some time. I plan on driving my car on long cruises and think the 2.93 gears will get me fair gasemilage. If the car really feels like a slug with these gears, Ill go with 323s later for local driving and the 293 for long huals.