i also own the same car,, n it ws originally diesel n i change it frm diesel to petrol engine,, n installed the same engine abt which u r talking abt,, its 1500 cc twin cam carborater engine,,,
aftr using it i strt loving my car more thn evr,,,its god in millege,, specially in cng,,very powerful engine,,
n as far as ur question is concerned,,, yeah B13 dnt need any extra modification to instal such engine,, cz these engine r designed fr those cars..