Shouldn't take long to get a Port running.
However, I wanted to overhaul GT for 1.7, so the Port would be highly incompatible (especially savegame incompatible) with newer Versions of GT, meaning unless you need to test if things are somewhat running, you should never use that Port, which also won't be an official Release, and the Download Link for the Port gets removed after the finished release.
They did in early 1.4.7, before Greg introduced the Assembly Machine.
Electron Tubes and whatever Buildcraft has are not considered Circuits anymore, UE Circuits are still compatible.