I’ll start with the easy-to-type questions. The others relate to pump and metering rod adjustments.
1) Use a gasket under the needle seat? I don’t remember one being there when I took carb apart.
2) I’m re-using the “original” needle and seat because neither included in the kit is even close to correct (more on that later). The needle tends not to fall freely when you turn the bowl cover right side up. It’s all in good shape. No burrs or rough spots or anything.
I’m inclined not to worry about that. Figure the incoming fuel pressure would move it down pretty easily. Am I wrong?
3) I’m accustomed to having lots of extra parts in a carb kit. But I’m baffled at the number of small circular gaskets that I have no clear use for. Is there supposed to be a seal around the outside of throttle shaft or something?
4) The base gasket covers one hole on the bottom of the throttle body. I’d assume that’s wrong. There’s a carb sitting atop my manifold insulator currently. Not sure whether there’s a corresponding hole in the insulator. If there is, I’d punch a hole in the gasket. If there’s not, I’d “notch” the gasket to provide access to the throttle bore. I should have taken a pic, but figure one of you has already dealt with this.