First off I'm new to ihc Engines but have played with other flavors. Acquired a 1973 scout with the 345 v8 auto. Purchased new battery, cleaned all connections (hate wireing Issues). Point were burnt up, replace points, condensor, rotor, cap. Installed new coil as their was not one, new plugs and wires. Engine would turn over but still sprayed cylinders with oil to lube. Compression check all cylinders have close to 110lb except #3 which has 90lb. Engine starts and idles but has a dead miss. Remove #3 wire no change. I'm guessing a burnt valve but not familiar at all with theses engines. When I pull the heads is their anything I need to look for or replace while I'm in it ? Thanks for the help just a newbie to these and don't want to miss something.