This is our smaller choice from Howards Cams, which we recommend for most non stroker engines that want lots of low end response and drivability on the street. At just 231/237 on the duration at .050", this is great for lots of vacuum for power breaks. We'd still recommend running aluminum heads with a decent (2000-2500) stall converter, and 3.23-4.10 gears. These are ground on a 110 degree lobe separation angle. Howards makes great stuff, you know it's 100% made in the USA, and great quality.