I went to SEMA last week and recieved some good information on the k-frames and lower arms. Both are being made with 1020 mild steel which I like as you won't have the cracking and work hardening issues down the road like you do with moly. 2nd thing was what happens if you put a floor jack to it like you do with the stock frame to jack the front of the car up. The gent I talked to said just make sure you catch both tubes with the jack and you will be fine. I would not like one that is too lite weight to be of use on a car for normal maintenance and useage. When I can swing it, they will be on my list of buys.