Key Code Question
 

other than on the key, did mazda stamp the key code into any other lock cylinder on an 82 RX-7? i know on some other cars, the key code is stamped into the passenger door's lock cylinder. just curious before i swap out all of the locks and ignition cylinder with a spare set off of my parts car. thanks in advance for any advice!

nope if you need a new key take your vin and your registration to a mazda dealer and they'll cut you a new key

to local mazda dealer told me that the car is too old and they don't keep those records.

Take a door lock to a locksmith. They can cut a key to fit. Then, hope all the locks are the same............

if the locks are original, then the passanger door lock will have a code stamped on it, most locksmiths can cut a key from thier codebook..
as far as making a key from one of you existing locks, i would be weary as the pins wear out in the door locks on our cars(hence why most any key opens your doors) so it wont work your ignition unfortinatly.. if your forced to make a key from one of your locks use the trunk lock as its used the least amount so the pins will have the least amount of wear

Decent Dealer
 

Keycode is stampped on the door lock cyl on the inside
If you deal w/a decent dealer yes they can cust a new key!!!

so it is on the passenger door lock? makes sense. i'll have to take the door panel off and have a look.