It would have been noticable to stamp the pad knowing the car was built in October 68 per the fender tag and the pan rail has a stamping of 4/69!!!!! I still feel like it is legit enough!
It is legit, somebody prob drove it like an animal when it was new and spit the rods out of it, viola instant warranty block.
I worked at a chrysler plymouth dealer in 1986. We did 3 warranty blocks in the year i worked there. One being a police packaged fury patrol car purchased by a local medical center for parking lot patrol duty. They certainly didnt need a certified calibrated speedo or a 360 for policing a parking lot. It came in on a flatbed with 4 bald eagle GT+4 tires, and an oil slick under it. They blew it up, and a rod was sticking out of the pan lol.
Point is this **** is pretty common. I bet even more so in the muscle car era.
