'76 400 in a '73 duster

The headers I got from pro tuning lab, they fit very tight to the block. The whiplash cam from what I've read and been told by hughes is their recommended cam for low compression engines. We'll be finding out, as it's what's in there now, lol not going to pull it now. I will be putting a stage 1 shift kit in the transmission with stall. Forgot to mention in earlier description the car is also a factory manual brake and steering, not that it'll be any faster, but won't suffer brake vacuum problems or power robbing belt on a power steering pump. I'm definitely listening to your comments and will be applying it to our 383 build. We've discussed getting some better heads in the future for the 400 if we aren't happy with where it's at.