3:73's are for street fun and racing- nothing else. I had a stock Monte SS 3:73 rear and I hated it. 5000 rpm just to keep up with traffic. It took an entire tank of gas to get from Queens to Englishtown. Another tank to get back. YIKES!! I soon swapped in a set of 3:23's I got from GEVO's Gears and Rears. WAAAAY better. I also had a RAM B&B style clutch, like 2400lbs or something. My leg hurt in traffic. I switched to a Diaphragm style and never looked back. Today's Diaphragm clutches are as strong as the B&B but as the Belleville spring gets depressed the pedal effort goes down, not up. A buddy with a '55 Chevy just broke his TKO. I didn't get the whole story, but it proves anything can be abused and broken.