Labor peace is sometimes the price of success. Boeing settled its two-month machinists strike late Wednesday night so it could get busy filling the biggest single widebody jet order in history: a $12.7 billion contract to deliver 77 of its 777 jets to Singapore airlines. To do so, the company is giving the machinists almost everything they asked for, including bonuses indexed to company performance, increased job security, expanded medical coverage and an extension of the new contract to a fourth year. The two-month walkout had already delayed the delivery of some 30 planes, costing Boeing hundreds of millions of dollars. Most of the more than 32,000 machinists covered by the new pact are expected to be back on the job Friday.