Limited mechanical advance by adding weld to the weight tips.
The added 1/2 inch riser under the carb required air cleaner modification for hood clearance and now has a big block engine decal. Also note the header tubes and welds are turning color already. Hooked up my old Edelbrock O2 sensor (not wideband) and indicates the carb might be a bit rich but not excessive.
Now the bad news. Something broke in the valvetrain. Not sure what. It sounds like a 250 in an old pickup truck, no offense to truck owners here, just a reference to the typical well used 250 ticking valvetrain. My first guess is a cam lobe went flat but we'll see. Maybe I should drive a little slower.... NOT!
