It was a standard HZ Sandman originally ie 4.2L 4spd except it had the economy rear axle (3.08:1) rather than the standard rear axle (3.55:1). There are two of them as consecutive PSN's built on the same day, this one and a Panama green car. GMH must have built them for stock order so they had some economy rear axle cars available ready to go. Wouldn't have been very popular to order if you got to test drive one though, with the gutless HZ pollution 4.2L single exhaust engine and 4spd they would have been a bit of a slug off the line.