Hi, my '47 Chevy Coupe has a metal plate riveted to the left side of the firewall, on the engine side under the hood. This plate has the serial number, body style number, color combo numbers, etc. etc.... Can't remember for sure if '46 was the same or not, but you might want to check and see if you can find 4 rectangularly spaced rivet holes in the left side (passenger side) of the firewall towards the engine. The plate may have been removed or damaged over the years. If the holes are there, they will be about 4-5 inches across from hole to hole and about 2 inches tall from hole to hole. You might also check out Chev's of the 40's website. They used to have some ID information for these cars which showed a lot of the VIN information and where it was located on each individual body style. I hope this helps you out some...good luck!

Sources: Chev's of the 40's website: http://www.chevsofthe40s.com/index.lasso

serial numbers are stamped on a plate on the right front door hinge pillar. a fisher body number is stamped on the engine side of the firewall. if its a stylemaster it will have DJ in the numbers and if it is a fleetline or fleetmaster it will have DK or 21.