thanx guys.
It was really a great help from u guyz. ive decided to go for the swap.
Now ive two options,
one is to go for the qabli engine (the vendor is giving me waranty of 1 month).
The other option is wat testdriver did with his engine.
one thing i wnna ask is that, is 1 month time enough to get the idea abt the engine condition.
thanx and regards