Great work John. It flows great and I love the sentimentality and wording. Since the tense in the first verse is different from the tense in the end, it will throw the lyric off (I didn't see that before) so maybe you can cure that by using "My dad got a 57 Chevrolet" ..If you say drives at the beginning, but later we find out he has passed away, then the listener will wonder how he drives when he's not alive. This change (or one like that) can remedy that. Just my two cents my friend. I've looked it over 3 times now and that's the only snag I see. It's a well done lyric.
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