I was telling a friend that I was going to order a 347 today, and he said that they will smoke a little after 10,000 miles. Is this true? My 331 did good to me,but I was thinking why have two 331s. I need this engine to last as a daily driver for about 2 1/2 years or so. I totaled the wifes benz and she took my f-150 so I need that time to save the cash to buy her another car.[ thanks to dave ramsey, I pay cash for everything]. I'm not looking to get a100,000 miles out of it,but maybe ......99,000.