When I did my conversion I did not install the AC system as I did not have the turbo AC condenser and was under the impression that you needed to use several of the TT lines to make it all fit. Typically on a conversion people get all of the TT lines so it all just goes along with the conversion. Well, I finally bit the bullet today and decided to see how far along I could get with the NA lines. Guess what? Heh, they fit with a little 'massaging'. Nothing major though. Its nice to have AC again! :)