'76 400 in a '73 duster

Years ago I built a 71 Duster and installed a 76-77 400. The engine was stock that I R-ringed and added bearings, used home ported 906 heads and a mopar 292/509 purple shaft cam. Low deck tunnelram with 2 500 Carter AFB carbs. Headman 1-3/4 headers, no name 3500 stall, 8-3/4 with 4.10 gears. 28x10 slicks. I used parts I had laying around. Now this was about 8 years ago when I built my Pro-junk yard Duster lol. But I think the car was runing 13.20/13.30 in the 1/4. It wasn’t very fast but was a blast to drive on the street. Lol