No tools left over, we did check. I bought the heads several years ago, and just got around to installing them a few weeks ago. I took them to the machine shop, and ordered/installed the right springs for the cam that I already had in the motor. I don't know what happened between the 2nd video I posted, VS the first one. The engine is fresh, it only has about two and a half thousand miles on it. It is the Performer RPM cam, .496/.520 for lift specs. The Edelbrock dual quad package, on a .030 over 289 block. I had to learn the hard way about push rod length, springs, installed height, etc...I drove the car to my buddy's house with a garage, and we took the iron heads off. I had the machine shop verify that the springs I had that came with the heads were either good, or not. They said no, so I had them install springs that met the installed height/rate requirement. The overall height was maintained, so no PR change was in order. I re-verified the valve stem tip before we buttoned up the motor, and put it back together. In person, it sounds like it is backfiring up through the carb, there is only slight roller rocker noise coming from under the valve covers.