I am about 80% done with the Gen 4 install in my 68. Here is a link to some of the install pictures. The only picture I forgot to take was how the factory controller is integrated into the new system. Overall it hasn't been too tough, just time consuming. I like to take on alot at one time (glutten for punishment), I am doing the VA system, a street and performance pulley system and converting to a covans dash unit all at the same time. Let me know if anyone has any questions.
http://rides.webshots.com/album/560202775dZkBLK