I've finally made up my mind for my 94 Civic Si. After contemplating on how difficult it would be to smog a jdm engine (b16 sir II) or a OBD2 engine (b16a2) in California, I've taken the easy way out and decided to search for a OBD1 USDM b18b to put into my Hatch. The engine will most likely be built with a slight chance of turbo in the distant future. Questions are; will i really feel and preform much different from the stock sohc vtec engine (d16z6) already in my car? If not should i just build and possibly turbo the d16? And whats the average price on having a b18b installed into a civic? Your help would greatly be appreciated.