In a perfect world or someday when I get things changed, I'm height challenged. If and when I find a buldge or scoop to get the air induction to the carbs corrected.
The breathes were a PCV cure that I cooked up after a foaming situation. I have a catch tank on the right wheel well with a K&N filter ontop. Air is filterd while being sucked into that tank then by way of the hoses to the valve cover breathers. I removed the rear manifold breather stack and installed a hose nipple that connects to a single PCV valve and then to the intake manifold plenium. That way filtered fresh air is pulled through the tank through the valvecover breathers downward into the lifter valley to help rather than hurt
oil drainback Any thing produced is pulled into the intake and burn't and in the event of a catastrofic engine failure, system fluid would be captured in the catch tank.
There is no vacum advance it's a Mallory centrifigal advance distributor. I found that the more initial advance I dialed in the distributor the faster the engine idled. I had to back out the carb idle screws to keep the idle down to a realistic idle rpm level. I'm sure that the carb butterflys were open enough to expose the transition slots at idle before I adjusted the distrbutor advance upward.