Thank you for your generosity and point. Have to excuse myself, unfortunately there are some errors I made with my answer. ()
The car underwent some fundamental modifications between 1972 and 1977.
1972: 2 cars built, driven by Morcinek and Surowka, Skoda 100/110 based, Skoda 100/110 gearbox, Moskvich engined, first bodywork (see attachment 1)
1974: Car bought by Jan Janku: Engine swap from Moskvich to Chrysler 180
1976: Car sold to Emil Figuli: Chassis heavily modified (MTX at the front, tubular frame at the rear), new bodywork made by a company in Havirov (design Ladislav Hradsky?), still running an Chrysler 180 engine ( uprated to 2000ccm, 2x Weber 45 DCOE)
The puzzle car shows the 1976+version of the Morcinek Spider (Chrysler 180-engine and 1977 is correct). Not Moskvich engine and not 1972, as I claimed with my answer
Sorry, for the mistakes