I think the form of conversion you are going for ... is a very crude form. What they do is.......they keep the outer axles of fiat and the inner axles of toyota/whatever and then they weld the damn thing somewhere.
When a heavy 1.7D iron cast engine will be replaced by a lighter weight petrol aluminium block. The suspension WILL have to be adjusted. In a proper conversion, the suspension, and brakes will have to be re adjusted replaced.
In any case. I sincerely advice you, not to get the coversion done from Lahore. If u're in Lahore, you better go to peshawar for that. I am sure there will be other pakwheelers there ready to help you.
Sold out without my consent. Long story.