Yeah, I took ETKA for some hours to see there are a lot different parts used in these two Skoda base engines. Actualy almost all of them. But as it looks to me there is a chance with minor alteration or none to do it. It's like putting 120L parts in 105L engine block- that we did a lot of times.
In the worse case scenario i will fit the whole 1.4engine + ECU. I guess the wire loom will be the same- still will be chacked that.
These engine start production in 1000MB, then 100S, 105/120/Rapid. Have renovation with improved head and some parts in Favorit, Felicia, than again an improve in Fabia/Octavia. They all have 3 main crank bearings. In Fabia there is the best consctruction. Some colleagues in Czechia even do 1.4 with turbo witch holds pretty much ok on boost. 120++ hp...