Thank you for the replies so far. Yeah the Chevelle was a blast to drive back in my younger days. My father purchased the car from a neighbor in 1970. He immediately ordered the Lt-1 to replace the original 327. He gave the car to me when I was 13 or so.
I have been studying crate engines (especially the ZZ4), but have never driven a roller cam engine. I have read that they don't sound like "muscle car" engines. Is this true of all roller cams? It may be superficial of me, but I really love that Lt-1 sound. Or any built small block really.
The Chevelle will be a cruiser, not daily driver.

Thanks again!