I had that issue years ago with my T-Type. It would race around on its own for a minute and then idle and run fine. I had a few vacuum leaks and my IAT was cracked. When I replaced that it stopped.
Items for sale: Located in McHenry, IL
GN / T wheels set of 4 : $150.00
Valve covers with felpro gaskets $45
GM carpet mats front and back $50
GM front rubber mats $25
Kirban rear seat brace kit and hardware never installed $50
Like others said you should wait 6 months on a new paint job. At that point if you want to polish and wax you can do it by hand. No reason to use a buffer on new paint.
Ran across this pic on another site. Like other said they used to be good. Not so much now. Talked to someone at the local Advance Auto and he said they won't even carry the Fram oil filters anymore.
Beautiful car. Funny I have had my T 8 years. Still have it. Just bought this. 1969 Buick GS California. 350, 4brl, Poston aluminum intake. Has single exhaust so first thing I'll be doing is getting a dual put on.