Differences and Similarities between 39/40 Chevy Coupes

I recently picked up a 40 Business Coupe that was someones elses previous project. The body of the car is very solid (minus the floors) since it had been channeled over the frame. The car is practically all there, however there are a few pieces missing. My question is ... how much of these cars are interchangeable, if anything at all?

 

You will find some mechanical parts that would be useful,but body sheet metal ,not very
much would be of any use.
Good luck with your project,

..................Jack

 

40 chevy frame is all by itself..39 is narrower and 41-48 is different too. Glass should be the same

 

ok - thanks guys

 

The coupe bodies look different, I'm not even sure they share the glass. Windshield and rear window possibly.

 

spooler41 is right, `40 is all by itself.

 

1940 is all by itself body/sheet metal standpoint
- headlights mount on top of front fenders
- 1940 has parklights on top of front fenders
- grill is 1940 only
- hood is "clamshell", hinged at the cowl (39 hinged in the middle)
- 1940 has hood sides (panels between hood and fenders)
- 1940 last year for running boards
- rear glass is curved (I think 39's are flat)
- bumpers and brackets are 1940 only

Those are just a few I can think of sheetmetal/bodywise