Front air bag plate question.

[idonutn0]

Ive lurked for a while on this site, and am starting a frame off build in a month or so. Id like to do air ride on it but dont have the money to spend on new A-arms or the experience to put cups in the upper arms.
I found an ebay ad that has upper and lower plates that bolt on to the a-arms. Is this a good solution? Maybe if they were welded on? Would I get as much lift/drop?
I am in no way affiliated with the seller, this is a legit question and I know this is my first post. This is a serious question and NOT spam for the product,
The add is here:
http://cgi.ebay.com/ebaymotors/67-72...spagenameZWDVW

Thanks for your time and help