Hey everyone .just wanted to say hello my first post. I've had my 5.0 for two weeks the first half ton I've owned in over 20 years and love it but when you drive a diesel for that long the torque spoils you lol.when I first got it it had 331 years and I don't know why anyone would own a truck with 331 gears unless you wernt going to pull anything more than the weight of the truck. Things have changed allot over the years with trucks.everyone owns one now just for everyday soccer mom use.okay on to my little review .so I pulled my boat roughly 4000 pounds to tawakoni and back in in Tyler and I averaged 6 to 7 mpg and pulled horrible! I'm thinking 4000 pounds that's nothing! I almost took the truck back. But then I kept thinking it's got to be the gears. So I put 373 in it and wow! It's really like night and day it pulls really really good and I got almost 9 miles to a gallon. I would say to anyone if she's going to 5.0 with 331 gears be ready to swap or be extremely disappointed with the gas mileage and pulling..I would like to know though if there anything I can do for just a wee bit more torque down low under 2800 rpms?... I forgot to mention the dealer messed up the price and I got front and rear gears for $484 parts and labor so a really good deal not for them though LOL