Don: I looked through my POP stuff, and that code looks the most like a 400-THM code...but if that's the case, it should be "69A" which would either be a '69 350/255hp or a 396/265hp, as opposed to "59A" shown...but since the only one of those available in the Chevelle was the 350 we'll go with that. And if the above is true, the "R22" is *supposed* to be the build date code, and should be 3 digits instead.
So, what powerplant was original to the car? Am I close?
