isi engine ka block change karwa lo. will cost you around 15 to 20k. this engine is best
^^^^what about head job???poster will end up in another job,nd this setup isnt that much responsive,regarding city's engine,thats 1300cc nd d15b is 1500cc so its betr to go for a d15(its simpler,econo,responsive,reliable,parts are widely avlabl)
yaar yehi engine theek karwa lo, don't change the engine if its not dead.....engine swap is a big hassle ....
^^poster said tht engn has done enuf on roads!
Chalo phir don't go for d15b realistically, go for Honda City 98-2000 1300 engine, it suits this car as I owned the same car a while back and did the same swap.....it d13b carby.
aur merey bhai main gadri utarwa kar us ki foundations check kar leyna badi wali side par, takey un mein rust na ho...if your floors are rusted get that done first.
Thanx all 4 ur valuable suggestions