Hi, i have an old fiat cinquecento 899 that isn't quite properly working so i can sacrifice but I'd really love to get a 850. Now, i can get a 850 with a quite good body but not working engine. Can I swap head and everything from my 899, keeping the 850 block, piston, rods, cams, crank, and make it work with the single point injector? Is it possible to fit the lambda sensor to exhaust manifold and make the ECU work? I'd love to have fuel efficiency and reliability from an almost modern ie engine but in a rear engine rwd car, is it possible somehow?