If you really aren't going to beg/borrow/steal a squat rack (which I really think you should!) then you should look into hack squats.

Lunges would be a good addition as well although not a replacement for squats I'd say.

IW

The hack squats worked out better than I thought. While I was doing them, I thought to myself: "This will probably be the same as doing deadlifts", but as I progressed toward 164 pounds, I found myself having to borrow more and more strength from my legs rather than my back.

It was a good suggestion, thanks for your help.

Well yes, the hack squats will be a much more leg dominated lift rather than back. Having the bar behind your legs pretty much puts your back into direct compression rather than having it try to bend you over like a DL.

However, you can do DLs as well for a more low back/hams oriented lift.

IW

Well I think I might try front squats if I continue to have trouble lifting 150+ lbs above my head. I can squat heavy weights, no problem, but getting the heavy bar above shoulder height is a real challenge.

I don't need as much force thanks to the added muscle weight. My body's size hasn't changed much, but the power is substantial. I hope that the weights and sports training continue to work in harmony together