JS. has same key for ignition and deck [ after March 1931] .including the spare tire lock.Only some used Crown keys until ignition and door keys were matched. I would wait till New Standards come out [might be some changes???] and maybe not... The Restorer March/April 1992 Volume 36,Issue 6 [Cal Allen ,Chandler, Arizona ..story] or ask Dick Crabtree,, SD. ..2 guy's for very good info.