Hi, I’m building a 68 charger RT. I have a 512 stroker kit from 440 source. I want to run trick flow heads and a solid roller cam. I am trying to find out what cam shaft I need to keep the vacuum up for power brakes and still have good performance. I was told this might work, 242 intake, 247 exhaust at .050 on a 110 center lobe. It will have around 10 to 10 1/2 compression. It had 10 to one compression with 440 source heads. The last engine I had in it had so much cam that the brakes would go out now and then. Or would an hydraulic cam be better? Any info I can get would be greatly appreciated. Thank you