The following notes regarding ZR-1 prototype history and production were compiled by Tyler Townsley. The Corvette Action Center would like to thank Tyler for compiling this information and allowing us to include it here.
"The sequence of events for the proto cars was as follows, all the engines were built at Lotus from parts procured by Lotus usually from the eventual production supplier. Around 36 of the engines were shipped to BG for fitting into the proto cars another 8 or 10 engines went to the likes of Sealed Power in MI, Bay City cams, Rochester Products, etc for component testing. A further batch of engines, not sure how many, were built for dyno testing at Lotus. The only engines that had the type of log book you have were the vehicle engines.
As the cars were built at BG they were allocated to various engineering groups within GM and to suppliers to the programme. You will see on most of the build sheets that the cars were allocated to the engineering group at Warren this is because they had the ultimate sign off responsibility for the cars, in other words they were all shipped to Warren prepped for delivery and shipped to there final destination from there.
Not sure how many but several of the P2 cars were shipped to the UK for emissions, drivability and performance work. During their life in the UK the cars would have had their engines and other chassis components updated as the later level parts/engines became available. It was not unusual to have changed the engine in a particular vehicle 5 or 6 times, especially the calibration cars. My car (His car was next after mine and is one of the squashed graveyard cars) was shipped to the UK and back twice. It was used for the hot environment test in 88 then emissions certification and then shipped to the UK, shipped back for some work in 90 and eventually was used for oil consumption tests in the UK in 91 fitted with a production level engine. It met its end at the beginning of 92.
All of the proto and production test/dyno engines that were removed went to the scrap. That's what makes your car so remarkable, it is as BG built it. I don't know of any other P2 mule as they were called that has survived let alone as original as yours.