Welllll, you have to know what is really going on for a complete understanding. Like the General's 305 and Ford's 302, the 318 was Mopar's bread and butter engine. Now this part I am hard pressed to understand, they all had cams that were created with 0.030" to 0.050" less intake lift as compared to their 350ish cousins. None had decent vaccum, power or fuel economy, in the name of clean air. That is where all got a reputation as crap engines. The Ford did not get the rep as bad, but when Ford cam out with the 302 HO, it had a 351 cam and firing order. All you had to do to wake them up was install the 350ish engine cam and voila. Now going one step further to and "RV" cam with 204/214 at 0.050 and 0.450" lift really got them on par.