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Im pretty familiar with the engines that usually go into Civics but thats about it and I just have questions about everything else. I currently have a 93 dx coupe with stock everything (D15B7) with 235K miles. I use only honda parts and liquids by the way and the car seriously runs ****in perfect, no need for a swap now just trying to get a price range when necassary. I wanted to know the complications that would come with replacing it with one of these three engines. The questions mainly regarding keeping the current transmission and ECU etc. First one D15 SOHC VTEC; Second ZC 1.6 SOHC VTEC; third B16A. I am aware that the B16 is the most expensive here but Im afraid that I will need to buy new tranny and ECU thus almost tripling the price of the first choice