Spare Engine in Hatch of Race Rabbit
The engine in the Race Rabbit is a purported to be a 1.8, while the 'spare' engine in the hatch is a 1.7. The current engine is believed to be stock, while the spare appears to have some porting and polishing of the intake and exhaust ports. Unfortunately, it appears water went through the velocity stacks, into the intake ports, past the valves into at least a few of the cylinders.
Internet says the 1.7 engine is inferior to the 1.8 in numerous ways so we don't have to cry too many tears over too much spilled milk.