Idle screw question. Rich or lean?

Seems I didn't let the carb heat soak enough either. Much reduced after the carb gets warm from a longer drive (phenolic spacer) I am also running an open plenum spacer on a dual plane manifold. I might try a half inch 4 hole to replace it and see if that helps.

Engine is coming out for rear main seal and pan gasket this winter. So I'll explore all of this more with the power valve change in spring again. I haven't checked anything valve related on it either, like rocker arm lash etc. Its got 186,000 kms on it. So again, won't delve to far into this at the moment.

Also noticed a spot of coolant on the rear manifold stud. So intake gasket time