I got a brand new manual rack, brand new Moog outter tie rods. Just got it aligned yesterday.
When I'm going fast I start to lose some control.
I can't go above 65 it starts swerving left n right.
Brand new motor mounts innovative.

The only thing I can think of is where the steering rack connects to the steering column, there was a bushing or something, and I forgot if I put it back or if I didn't install it correctly. Could that cause this major fun killer??

 

The steering rack bushings?

LOL Yes, you need those
Di you bend the tabs for the inner tie rods so they won't come loose?

 

Not the bushing that wrap around. You know how the steering rack sticks up into the inside of the car, then its joined at the column by those 2 10s? Well were it sticks in, I think there was a bushing and Idk if I miss installed it.
I also did some research on LSD trannys. Is it true that if your tires are mis matched, the LSD will send too much power to one wheel ( the smaller one) and cause the car to lose control?

I lose control above 45mpg, but as I let off the gas and cruise it drives normal. If I slam the breaks, it breaks normal and straight. It only sways when I'm smashing or accelerating hard.
I looked at all my wheels. All mis matched haha. They're all 14s, but ones like 195-65, other is 175-60, 185-60, 185-65.

 

hmm, I don't recall that bushing, but it doesn't sound like that would cause your problem.
Also, I'm not too keen on LSD's. But having mismatced/uneven/unbalanced tires is where I would start looking.
Check your ball joints.

 

Ball joints are new. They're Moog. UCA are new too.