Your name is SBC and you're asking?
Entire books have been written on this topic. I think it's the best street car engine created to date. My take (and I haven't read enough to see anyone else write it up in these terms) is that if you compare engines by usable performance per pound, or usable performance per exterior volume, there is very little in the same territory and nothing at the same price, reliability, economy, and flexibility.
Usable performance = total area under the torque curve, not peak torque or peak horsepower.
There are lots of engines that have better power per displacement, but that's a useless spec sheet figure outside of racing classes defined by displacement. What defines VEHICLE performance is the size of the exterior dimensions, not the interior.
The same pushrods that get poo-poo'd as old tech allow an ultra low profile, weigh very little, and deliver broad, broad torque. Not to mention low maintenance and insane fuel economy. You can fit that engine into more places than any other V8, a lot of V6s and even some DOHC I4s. And you have more flexibility to optimize CG and lower the overall vehicle architecture.
Put more simply, find another stock street engine that does 500+hp and weighs less or is smaller. You can't.
