wolfeenterprise

So i have gone thru two front tires on my 95 hb in the past couple weeks. And the tire is wearing on the inside edge of the tire tread, I am figuring i need new ball joints or upper control arms. (A-arms) I have already changed my passenger tire with my spare and now the driver side is going thru the same thing.. I am trying to figure out what parts i need to order to get the job done in my garage. and then go get it alligned , I had a similar symptons on my previous car (94 teg) only with that one the outter tire tread wore faster ,, and i ended up changing the a arms and allining it and it was fine. ... any ideas????