Thank you, everyone!!
Cat, the throttle shaft did have some slop,but I don't think it is too much. Just a tiny bit, although I hadn't thought of that causing vacuum leaks. And yes I did measure for the rear crossmember. The factory only had 2 under the bed floor, but I'm putting 3. One lined up for the frame and the other 2 spaced front-back, just for more support. I do appreciate the reminder, it's easy to forget!
TJ, Well I'm actually home-schooled, and I'm the youngest in the family therefore the only student left. Although I wouldn't mind teaching at a trade school or something, as a future job, I might actually enjoy that. Although I don't think I'm knowledgeable enough, I still have much to learn. Even outside of cars, if you haven't noticed my writing is not really superb!! I don't t know how my photos work, I just upload from gallery and it's alway worked! I don't really know why they come out bigger.
Bm, when I move the throttle the metering rod comes up and the accelerator pump shaft moves. All pretty quick with throttle movement. So it's probably okay, I must have just not paid enough attention to how it was before.