1972 Demon Build

Ok. Setback number 1. Put the motor on the run stand. Ran for about 3 minutes before utter disaster. Seems as though my attention to detail was off. The heads came from a machine shop and were "gone through". I assumed the valves were new. Well...as the valve snapped in two and was inhaled by the cylinder, all hell broke loose. I literally could have puked. Inspecting the valve showed it had some old hurt that just couldn't take it. Completely disassembled, put into plastic and set aside until I can not be angry.