Off topic engine question

[AutoInsane]

I know the question is off topic so please accept my apologies. I promise I wont make a habit of this.

I was on a Jeep forum and a fellow was asking questions about building a Ford (waits a sec..looks up.....ok..no lightening ...keep typing) 302 to put into a Jeep. He was thinking about putting GT 40 heads on it. He was told the GT-40 heads were only good for hi end power and also the 302 in general isnt as good for low end torque as the Chevy (did i redeem myself mentioning Chevy?) 350.

Wouldnt you be able to build any engine to be good in either the low end torque range or to be a high end, high horse power engine?

Isnt the cam the true deciding factor and the valve train in general of low end or high end. I do understand the intake manifold also plays a part in range of power.

What would make a design of a cylinder head specific to high end or low end power?

One again sorry for the obsecure question but it is bugging me and I know that I will get a good answer here.