You quite literally can’t make an accurate ‘39 out of this kit, using kit parts. There are just too many parts missing, or inaccurate ones. ‘39’s look a lot like ‘40’s, but the devil is in the details. To make a good ‘39, you need a ‘36 for wheels, and hubcaps, and the banjo steering wheel. Then you have to come up with a ‘39 dash ( good luck with that).
Olderndirt