So when I bought my truck, I was told it had 3.73 gears, which was nice. But I cant can't over the fact that this thing is a dying dog off the line. No stumble, no hesitation..just...slow. even for a fresh 355/th350 and new street avenger carb. My 4.7 jeep with 3.73's and limited slip launches so much faster than this truck. My jeep throws you in the seat with less than maybe 300lb/ft torque. It's certainly doesn't help that this truck has an open diff and bald rear tires, but I figure it's gotta be something else. I know I was gonna get a posi/locker in the future. And I needed to know the axel spline count. So this afternoon I tore apart my rear end. It's a 8.5 10 bolt with 28 spline axels. And behold what I believe to be my big problem. I have 2.56 gears! Counted the teeth on the ring gear and pinion and came to 41/16. Did the math and came to 2.56 ratio. So it appears I was lied to when I bought the truck. And now it makes me question if I really have a 3k stall converter and .30 overbore. So now it looks like i'll be buying new gears with my taxes, was looking to new heads. But I see no reason to build more power when I can't get it planted to the ground properly.
My questions are which gears should I go with. I'm deciding between 3.73's(which it should have already had), or 410's. This NOT a daily driver or track car, strictly a street truck that I would use on the weekend. So I don't care much about gas mileage and road manners. Right now it's still in a resto phase. Which ratio would be better for a street truck and torque? Also, about a locker. Which are some good brands and brands to stay away from. And would it be better to go with a limited slip, or a automatic locker? Any help would be appreciated.