Its me again lol

I may have a vacuum leak, but it isnt around the carb. I just checked... unfortunately this truck runs everything off vacuum... the 4wheel drive, the heater/ a/c doors, the brakes. So now I'm chasing vacuum lines to see if there is 1. I still have a small stutter, but not nearly as bad as it was. I'm at 12* and wondering if it needs to drop a little more. Having almost no idle set screw at 16* is odd to me. Is it unheard of for a cam like this to run at such low timing * ?