I've got a 401 Buick that's going in my '401 coupe so I'm partial to Buicks, but I'm wondering why the small aluminum Buick motors are not more popular, especially in smaller cars like a '49-51 Shoebox Ford. Rover/Land Rover used them until the 1990s. Has anyone ever put on in a shoebox? At least on paper, they're light, good looking, available and a host of new and used performance parts are available that seem to go for reasonable prices. A small, good looking 200+ HP engine with decent torque that weighs less than 400 lbs would be perfect for a shoebox or earlier. What am I missing?