Mainly the Aluminum Brownfield cylinder heads didn't require as much torque like your cast iron ones did. That is a good point you brought up about misc. bolts as such being used numerous times. Reminds me back when I worked for Lockheed aircraft and we had a crew that did nothing but removed and replaced critical fastners throughout the plane on a 200,300,500 etc. etc. hour schedule. Believe it or not, I kind of miss those good Ol days.. Thanks Jerry..