I bought a used 440 last winter and I put it in my 70 road runner last weekend. Here is my problem. I got it fired up and it seemed like it was only running on 6 or 7 cylinders. I ran it for 20-30 minutes, turning it off occasionly to check timimg, etc. I noticed that the exhaust manifold on the passenger side was very hot to the touch. Yet the driver side was hardly even warm. I could hold my hand on it becasue it was so cool!. I started it again and crawled under it to check the exhaust coming out of the exhaust manifold(there are no exhaust pipes on it yet) Almost nothing was coming out of the driver side but on the passenger side it was coming out stronly and it was hot. I am going to start on it this morning and check it out some more. I was thinking blown head gasket, cam lobes worn? Everything is new, cap, wires, electronic ignition, spark plugs. I checked the firing order again thinking I messed up on the wires, that's okay. It idles and revs up okay, other than having a slight miss, but it could be better. I did not drive it because I am waiting on a driveshaft. Any ideas guys? Thanks, Steve