as title says will a 1.1 engine fit into a punto 60s that comes with a 1.2 engine? Thanks

yes it will fit in, but it is a much better idea to stick another 1.2 in. the 1.1 will requrie a difernet ecu, and then you need to swap the codebox and red key chip and teach the 1.1 codebox your blue keys. your insurance will cost more even though it is slower. it will devalue the car and make it harder to sell. overall its a bad idea with no advantage i can think of.

I think it would work fine with original ECU as there is not a big difference in engine size. Only with cold engine it's possible that it would run a litle more rich, but when hot there won't be any difference as lambda is controling mixture

ok thanks for input - think were just going to repair my current engine instead

just bolts in, will be fine with your ecu