Looking really good.
Are you solid mounting the motor to the frame. Or is the some wiggle room in the exhaust that I am not seeing.
I had really tight clearance on my exhaust near the transmission mount. After about 2 Months of driving it. The bolts holding the flange from the header to the pipes Loosened themselves up and wobbled out the holes. It took me forever to figure out what caused it. I found it because the exhaust pipe rubbed all of the paint off of my transmission mount. I had to cut a notch into my transmission mount so that the exhaust was not hitting during heavy acceleration. Plus it got rid of the vibration that I spent forever trying to track down.