want imfo on 512 400 stroker build

hi gu ys im wanting to build a 512 stoker in a 400 block and i noticed Xp29h built one and had more imfomation on his build. i have a 451 now and im not sure if i wanna try something different with it or build a 512 anyone with build imfo and reliabilty would be great,

I've got 2 of them. One in my 74 and one in my 72 which isn't quite on the road yet. Torque monster motors. Money well spent in my opinion. I have manual valve bodied 727 trannys behind mine. You can fry the tires clear up to 60 mph. I have Holley 870 street avenger carbs on both. My 74 has stealth aluminum heads on it. .my 72 has sidewinder heads on it. Both have edelbrock performer rpm intakes. Also running Deep oil pans on both. I have a legendary drag racer from back in the day build mine so I don't have all the specs but I'll see if I can find the paper with all the info he wrote on it