I have a Edelbrock Performer manifold and carb on mine. Very simplistic and plug and play. As far as the valley pan.....just replace it with the FelPro replacement. I don't use the gaskets. That insulation is said to be used as a method of warming up the manifold and carb faster and/or used as a sound deadener. To me both a moot point since most of us don't drive our cars in the snow or cold weather. I don't use the insulation at all. Something else you might look at is replacing the the timing chain and gears. Chrysler used nylon timing gears to quiet the motor down. The problem is after all these years you probably have a tooth or two or more missing by now and can even jump timing. So I would replace it with a steel gear and chain.