Thread: 1940 Chevrolet Coupe Tech Questions

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As Roger points out, when you do the front end kit, you will get a drop. By using dropped spindles you can go a couple of inches more. Do as he suggests and find a rubber rake you like on a car and work from there. Ideally, your rear tire should either match the diameter of the rear fender opening, no smaller, but it can be larger. Use that as a starting point for the rear.
As for 14" tires, there are still some out there but if buying new wheels I would go bigger. My 40 is a real old fashioned odd ball. Look carefully, it has 14" front tires and wheels and 15" rears. It looks ok because of the rubber rake and the match of the rear tire to opening. If I was starting from scratch like you, I would do 16" on front and 18" on rear. Again look at other cars and see what you like.