Very close to my results. I have a Doug Nash 5 speed in my Coronet so one more gear of shifting but the results were close. My low deck 512 made 485 hp and 520 for torque. That was with a hyd roller cam, pump gas compression and a Holley Sniper. Here is a video of it on the chassis dyno. This was back in 2018.
https://www.youtube.com/watch?v=xG3-_YJGdZ8&feature=youtu.be I follow your posts very closely, and used a lot of your indirect advice when building this engine. Well, and the cam came off your shelf. Lol. I've been researching the Holley Sniper system, and I also talked to Rick at Big 3 racing about upgrading the control box to a programmable box to run my timing curve, since I just bought this carb.