I read that same article regarding the 383. I haven`t seen one about the 340. I did read an article (and I think it was in Mopar Muscle) where the 340, 383, 440, and Hemi were all rebuilt to stock spec`s and then dyno`ed. The gist of the article was that they were all very close to what the factory had rated them. The early 340`s were snappy little engines that came with 10.5-1 comp., a double roller timing chain, dual point distributors, and a nice set of heads. It didn`t take much to make these little engines scream. The exhaust manifolds are probably the biggest detriment to making power, but with a good carb, intake, and a set of headers the 68-71 340 will make over 300 hp without trouble and they`ve proven to be a quite durable engine.
