AC underhood component upgrade.

So here's my plan. I want to use the 85 truck compressor and hoses I have with a new drier, an aftermarket condenser and something for an expansion valve or orifice which I haven't figured out yet. I found some compression style fittings that will adapt the steel lines to the threaded AC fittings. Are these threaded AC fittings the same as AN fittings? Am I better off to get custom lines made than try and adapt my truck lines? I'm new to this AC stuff and am trying to do this cheap but I also don't want to waste my time with leaks. I'd appreciate any advice.

Cley