My neighbor has a 91' Legacy SS and is stroking the 22T for his build. He machined his block for the #5 thrust so he could run the Phase II 2.5 Liter crank from an STI. This gave him way more Rod options over the Phase I 2.5 NA crank he was going to use at first.
I can't comment on price because he did it himself at work. He is a very handy guy and a mechanical enginneer with some nice machining equipment at work. He said it took him a while to get the setup done, but the results were perfect. His name is All_talk on here if you want to search him out. His block is going to be sweet, closed deck 2.35 stroker with Pauter rods, ACL's and Wiseco's.