There have been a couple articles on here about picking the right type of squat and deadlift for your body type, that might be a good place to start. Another thought would be to find an athletic trainer (notice I said athletic trainer, not personal trainer - there's a difference) or powerlifting coach in your area who might be willing to take a look at your technique and see what he can tweak.
As much as I loved squatting and putting up some big numbers (got up to 500 last winter at a BW of 210ish - it was big for me), trying to do that with deadlifting as well was just trashing my lower back. I may have been overarching, I don't know. From watching videos of myself, I thought my form looked pretty solid. I tried alternating deads with squats each week instead of doing both in the same week, that helped a little but when I started pushing the numbers up again it came right back. I've never blown my back out, but I did dislocate my SI joint last year - that SUCKED. Managed to get it back in myself using stuff I found online, but it made me super cautious whenever I was squatting or deadlifting.
What I ended up doing was dropping the squat, and now I front squat on one day and deadlift on another. I'm training for strength and aesthetics, and have no intentions of competing, so there was no real reason to keep beating myself up. Doing this seems to have helped immensely in that regard.
I may throw squatting back in at some point, even if only for a couple 531 training cycles. But it won't be a mainstay any time soon.
EDIT: Also, what do you mean by 'blowing it out'? Have you seen a PT or ATC about it? If you aren't fixing whatever is wrong, it's just going to keep happening.