All,
The main reason these babies burn is the battery acid dripping down on the injector lines. When the lines are compromised the fuel sprays onto a hot motor and Kaboom! If fuel dripped, it would be more likely to runoff the motor. But when it sprays, it turns to a gas and is extremely prone to violent combustion. Fuel leaking under the car and not on the motor is dangerous but much less dangerous than leaking on the exhaust. We would create a battery box out of fiberglass to prevent this drainage of acid into the engine compartment. I believe you can buy battery boxes from the hot rod parts distributors today.
Consider it,
Dave