Got the latest version of the 275 tune loaded in the truck today. Didn't have a chance to beat on it much, but it feels like it has plenty of power down low. Trans shifts good in the first three gears but shifts a little funny in the others. Maybe it's the way the converter is locking up. This may change at wide open trottle. Will find out tomorrow. Haven't hammered on it from a dead stop yet, but when I got on the throttle in high gear the truck acted like it wanted to cut out. Couldn't play to much, had wife and kids with me.