Ive had my 79 LRE about 30 years and in that time have read most everything written about them. As we should all know, there are no absolutes when dealing with MOPARS. However, the LRE community generally believes that the 78 engines had the 68-340 cam while the 79's did not. No LRE had a smog pump or Lean Burn. The LRE engine for both years was coded EH1, NOT E58 different codes mean different specs. My 79 did not have a 340 spec cam in it when I tore it down to rebuild, it does now.