Received small block heads from an engine shop today. Had them insert new valve guides and do a three angle vale job. My question: Should I lap the valves? The engine shop did not return the valves marked for specific cylinders. This is a stock 273 ´67 year buildup.

Ragnar in Iceland

66 Charger, 451, .582" lift, 11" conv. 4.10:1. 4118 lbs 11.75@117 mph on regular Firestone Firehawk radials.
Icelandic Champion in MC 2007, 2008, 2009 and 2022.