true- trac

Would a true- trac third member be a good up-grade for a street driver?

Absolutely, they work very nicely i've used a few now

Well I just got one to install in my F-150 9" rear along with a full floating assembly with chromoly axles and I was hoping I made a good choice because there are more than a few different choices to make.

I have one in my truck now and Couldn't be Happier with it . Performs Very WELL !!!!!!

The tru-trac will hold up fine. The issue is even though you are going full floater set up on the 9", it's still probably not going to hold up the the 44" tires you plan to drive around with. It might as long as you stay of the skinny pedal, but any little romps on the throttle or decent offroad runs will shatter those axle shafts.

What about 40s or 42s?

im running a truetrac and they work very good on the street. on the track they seem to go away in the 60' after 3 or 4 passes