What will the average mpg be on my wife's 1977 Cadillac Fleetwood Hearse after we...

Richard

New member
...drop a new engine in it? I gave my wife a hearse for an engagement gift and I am giving it a new engine for her birthday. Its the same engine a 425/7.0L/V8

We just got sent from San Diego, Ca to a new duty station on Whidbey Island, Wa. And she has to drive it all the way there. I want to calculate the amount of gas it will take.
 
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