IMO you are wasting your time locking a 7.5, since you'll likely be replacing it all after you break it anyway. lol
At least you finally told us what axle you have. The best bang for the buck for a daily driver is probably an automatic lunchbox locker like an Aussie, Lockrite, etc. The lockrite is probably the only thing you'll find for that axle. Read up on them and decide if it is something you want on a daily driver.