Great find ssl78. Would love to find mines, but I’m looking for a 69’ El Camino that received my thought of original L78, lol, we talking back in 1973. If you ever find another, and VIN starts 604, keep me in mind. Thought I found 1 back in the mid 90’s, but very strange suffix to me, at the time, did not know suffix’s that started with a “K” as I was looking for a JH. Sadly I let it go, and now that I’m familiar with anything that starts with a “K”. Wow, learned the “K” codes about 2010, and my car’s original owner telling me what he paid for my SS new, has me desiring it to be 1 of 311. Is this an engine you might consider selling? Thanks.