Some of you may already know from my 65 Riv build thread that I had my Nailhead rebuilt almost two years ago. If I didn't mention in my build thread that this is my first build & probably should've tried a frame-off on a Nova before a 65 Riviera. Unfortunately, a frame-off was never my plan nor was letting my freshly built Nailhead sit around for 2 years   This short video was from finally breaking in my 401 two days ago. She sounded good & the Waldron's Imposter muffler purred