Hey everyone, I've recently got my car back from the mechanic with a fresh 68 400 Motor thrown into my 1967 Firebird. I've got a pretty heavy cam and all brand new innards. The only things from the last engine that were able to be saved were the heads and headers. I'm driving it softly for the first 500 miles until I get in there and change the oil and I've barely taken it out for anything since I still need to get the timing and carburetor dialed in.

Right now, it's dieseling because of the timing, but I've got an appointment with my new mechanic to get it all adjusted alongside my oil change. I've also got a temperature issue but it's looking like just a wiring problem.

Besides that, I'm hearing a noise that sounds like paper flapping in the wind when the car is in drive. I don't hear it when idling but as I take my car out of the parking lot, the loud cam sound slowly transforms into a slight paper flap that remains consistent and grows faster and faster when I reach higher RPMs. When I let off the gas and slow down to a crawl it disappears and all I hear is the cam. Could this just be the cam making normal noises when driving? Or is this a serious issue? I'm going to get this all checked out next week but I want to be prepared in case it's a big deal. I just got this motor built and installed last week, so I can't imagine it's already showing problems.