Did John Dillinger send a letter to Ford Motor Co saying he only stole Fords?

According to Jalopnik...

Notorious gangster John Dillinger's thank you letter to Henry Ford for making a great getaway car is widely considered to be a hoax. It isn't, but Ford covered up the real letter, likely parading a forgery for decades. Here is the text of Dillinger's alleged letter:

"Dear Mr. Ford - I want to thank you for building the Ford V-8 as fast and as sturdy a car as you did, otherwise I would not have gotten away from the coppers in that Wisconsin Minnesota case. Yours till I have the pleasure of seeing you, John Dillinger."
Yes, he wrote Henry Ford a letter telling him that he made the best getaway car in the Word.