its been covered quite alot, if you search theres sufficient information. in terms of price, as mentioned in other threads a number of times. no one can give you an exact price.
prices will vary depending on parts, condition etc etc etc.

so, best is to directly ask the provider of the engine/parts and person or shop whos going to do the conversion for you.
expect to pay roughly $15k....on top of that u gotta think about costs of upgrading brakes, engineer cert, blue slip, etc..