I have a 66 GTO 4 SPEED with a 1973 400 block and 93 heads, stock rear end gears. I am gioing to have the engine rebuilt and I was wondering if anyone can recommend what cam lift I should have installed. I want a nice Lobe and I love the muscle car ( cam sound) when a car is at a stop. would like to keep gears stock and drive on the freeway. any help would be appreciated.