It's stamped on the dipstick in the race car.
I have two complete unmolested 63 409's and they both have chrome dipsticks that have 409 ss stamped on them.I remember when I bought my 63 ss in 1973. When I checked my oil, the dipstick had 409 ss stamped on it. Does anyone remember having this stamped on a dipstick on your car? James jones
Hanging in there James hope all is well with you also!!!Hey 409 gang, you are a lucky mAn to have those today. Hope you are doing ok. James Jones
Under the rear main cap are 2 short notches. Small rubber bars come with either the overhaul set of the pan set. If they're not installed, it will leak. Only fix is to drop the pan and rear cap. Almost easier to pull the motor.There are a couple rubber seals that seal the rear main cap to the block, those can cause a problem also.