<=400whp Goal - Exhaust Manifold Options?

[BlazedGlory]

In the very near future I plan on doing some major upgrading to my redtop. My goal is for 400whp at the most. I've been trying to search for some info on manifolds, but I'm having some problems finding all the information I need.

It seems that it is accepted fact that equal length manifolds are best. I've tried to search for some options, but am having some hard times. I'm sure I'd be happy with a full-race manifold, but I don't really want to fork out that kind of money. What other companies make reliable equal length manifolds that don't cost $1000? Is there such a company?

What kind of difference would there be if I didn't go with an equal length manifold? What are some good companies that make non-equal length manifolds?

Thanks in advance...