Few random Q's about 318 and gauge wiring

MOPEkidD-3 said
1.) I finally got a vacuum gauge hooked up to my stock '70 318 and after playing around with my idle mixture a bit, I only got it to go as high as 15 in-Hg. Is this acceptable? I do have the stock divided-plenum low-rise single-plane intake (BOO :angry7:) and I only got a reading on the driver's side plenum, but I assume it would be similar on both sides. I tested the cranking compression on cylinders #1 and #3 (didn't get to the rest) and it was around 92 psi, and I'd assume the rest would be close to that because my starter stays the same pitch when cranking for an extended period.

15 in-Hg is fine. If you think you should have more, spray some carb cleaner or WD-40 around all the mateing areas where a leak may appear. The vacuum reading from the intake will be the same from anywhere else.
You can safely assume, but check anyway.
Better dead on balls accurate in knowing than assuming. It'll take 1/2 an hour to do this with coffee in hand right? Take a few min.'s.

2.) I read in an article about converting an '80's truck smogger 318 2-bbl. to a 4-bbl. that most/all of the old 318 2-bbl's (no matter the year) develop a bad hesitation off the line that has to do with the carb. Is this true, and what makes it happen? My 318 has done this since I got the car.

Like said above, that is a carb issue 90% of the time. Timing is another issure. A little more advance can't hurt much ethier. Just take the time to tune the set up real well.

3.) I'm putting some aftermarket gauges in my Duster and I don't know what I should do as far as wiring goes. Do I splice into an already-existing circuit, or do I create a whole new circuit? When I put my tach in I just hot-wired it straight to the fuse connections in the fusebox, and I know that's definitely not the proper way to do it.

Ethier way, new circuit or splice into an old existing one, would be OK.
I do a new one myself. It takes a little longer to do, but, when something goes south/bad, you know exactly where to go. Also, it is not taxing the OE wires further and when something goes, (Fuse) your not taking out anything else with it like as in what ever your tapped into.