Hi
I am in need of some ideas suggestions. I am having some troubles with my engine. It's a 56 235 as far as I know stock. It idles great can get it down to about 2 to 3 hundred rps just to see how low it will go. I keep it at about 5 to 6 hundred rpms. I had a holly webber progressive in it changed it out to see if it was a carb problem and it was not. It now has a single carb in it. The plugs all look as if they burn good slight black carbon seems ok mostly ash color. I do have a NAPA ECHLIN coil in it ic1600 oil filled high performance says to use with primary resistance or external resistor. I had an external resistor in it when I first started running this motor and had to take it out it was running very rough. The coil does get real hot on the outside. I did a compression check tonight and it was num 1) 120 2) 118 3) 120 4) 120 5) 118 6) 108 I have adjusted the valves while the engine was hot. So much for basic information now for the problem. As stated it idles great once I get it up to about 2000 rpm it bcgins to run very rough rpm drop and or bounch up and down as I rev it more. It seems that the rpms should at least stay even. At this point I am loosing power going down the road. At first I was thinking about changing or having the head rebuilt but I am not sure that is the problem. While going down the road I don't see any smoke of any kind. I can use any advise or suggestions.
Thanks for your help
Steve
