**NEW Edelbrock Victor Series Small Block Heads**
Im not all that good with words but as you get closer to the absolut max power a set of heads can support (a real 700HP RPM headed smallblock is probably pretty damn close to maxed out if at all possible)you tend to add more and more cam for a whole lot less benefit for each degree of duration and for every little bit of lift at the same time the usefull range of the engine gets shorter.
There is a point where better heads will let you make a whole lot more power with less cam. In my case i used a cam with 20degrees less duration and made a bunch more power while putting a whole lot less stress on the valvetrain both due to less springload but also due to less rpm.
With the better heads you also get longer valves and taller installed springsheights aloving more springrate with springs that survive longer and this makes the valvetrain more stable and durable.
Being able to make X amount of HP with better heads and less cam is just a win/win situation from all perspectives even thought alot of us would realy love to make all the power any given set of heads can support there is a point where its just not worth it and stepping up to a better heads is just the way to go.