As a result of the experience gathered and the army's comments on the operation of the 66 model, it was decided to modernize and better adapt this vehicle to perform the tasks it was assigned.

Due to the lack of technical and financial capabilities of the Starachowice plant, it was decided to carry out the process of implementing new design solutions in two stages.

The chassis featured a front rigid drive axle suspended on semi-elliptical leaf springs and two hydraulic arm shock absorbers.

The drive unit was locked with a 5-speed manual, non-synchronised gearbox, connected via a tubular shaft with a mechanically controlled two-speed reducer.

The Star 660M1 was equipped with an open, two-person N66-type wagon cabin with a tarpaulin roof that folded backwards and a two-part windscreen.

The modernized vehicle, designated Star 660M2, used a metal-tarpaulin roof structure for the cabin, improving thermal and acoustic insulation, and the shape of the engine cover and gear shift lever were changed.

After the end of the Holy Father's visit, the aim of the communist authorities of Poland was to erase the traces of the vehicle, which could have become an object of worship.

The gondola was dismantled and destroyed, while the chassis together with the cabin were transported to FSC in Starachowice, from where it was sold after a short time in October 1979 to the State Agricultural Farm in Główczyce.

Help was provided by people who had worked on the construction of the Popemobile 27 years earlier - fabric patterns were obtained, the canopy and umbrellas were recreated, identical seats were found, with the help of PKS in Ostrowiec Świętokrzyski S.A. and a company from Wąchock sewing covers.