No spanner....The first clue is the engine rebuild. It was very common to just switch engines, exchange if you like. It has a std pull start and correct carby for this model 4 engine no. The line code of 4 is another clue as most 4 special stds had this code, predicta often carried code 2. My opinion is this is a factory predicta with the incorrect engine. To my knowledge Predicta went no where near this serial number......the fact it has again some of its correct parts tells me it was real originally. Usually when this model has its skirt bolts its often real as they were not parts carried over to the model 4 special/std like the auto badge was, it was just not necessary to add them. I think it impossible to dispute the predictas engine run to the17-18, 000 run as it has been highly researched, and well documented. But if for some reason weve all been misled id love to be proven wrong...I wouldnt mind learning something new....you may have somthing unique...that would be cool:)
.