Yeah, I've lived a SBC sheltered life for the most part. Owned one Ford Flathead (my first car, '53 Mainline). Other than that, my other hot rods have been Chevy powered. I really want to expand my horizons and I think I want to experience a Buick Nailhead in something. My knowledge of them is non-existent other than I know there were various displacements over the years and apparently like many Olds and Pontiac engines, they were quite the torque producers. I like that thought in a light-weight hot-rod. Besides, they look pretty damn cool with their unique valve cover arrangement. What were the various displacements and is there any particular weaknesses to consider when examining a potential purchase? Thanks a bunch for any info/ opinions.....Don.