Took the SD out for a cruise night last night. She ran kind of crappy on the way home. After a lot of searching, I discovered the end of one of the original vacuum lines had split and was really leaning the car out at idle. I had to clip about a 1/2" of the line off to get past the damaged part. Runs fine now. This morning I put four gallons of 100 octane low-lead and filled the rest of the tank with premium. Took her for a ride and she runs nice!
Couldn't help but stop and snap a picture of today's mileage on the odometer: