For the trans cooler lines, these work great.:

Trans. Fittings -6 AN to 4L60 / 4L80

They fit into the factory clip-style fittings just like the OEM steel lines do, and let you connect a -6AN fitting to run -6 stainless braided line up to the cooler. I prefer running braided lines to the front instead of using the steel lines because there is interference between the steel lines and the A/C compressor bracket in a square body install since the steel lines have to be moved up to clear the cross member and the drag link.

I didn't have any oil lines to run. If you have an engine that used an oil cooler, you can replace the bypass with one like this, then drill and tap it and run the truck's original oil PSI sending unit in it:



For the AC, I used the 5.3's original compressor. The manifolds I used on the compressor are from docsblocks.com, P/N's AA2209 and AA2210. From there I used different angles of fittings to fit my application. I used all the OE parts for the 85, so it was pretty easy. I have a crimper for the fittings, so I made all my own hoses.

Here is a list of all the parts and fittings I used to put mine together in a .PDF file:

A/C parts list for LS swaps - 85 GMC