Is there a way to find what car this engine did come from? Story behind it is the husband and wife had a 69 stage1 convertible. She had no idea until his passing, there was this engine. It was a gift from her for helping her sell the 69. It is a PR code 68 400, but am curious did this just come out of an average car or a 68 GS. The stamping between 1&3 are as follows, 8H159511. Any input or help would be greatly appreciated, Thank You!