Originally Posted by hammertime
A really rich carb can give you lean conditions also. If it were mine I'd keep jetting it up untill it fell off in ET.. I'd start with 186's squared. I take it this car had a 850 alky carb on it ? If not did you change timing/plugs check float levels, pressure ? Just simple things to rule out.
Can a very lean carb give you rich conditions??? yes it was an 850 alky, i checked flot levels when i put carb on..