Manifolds on a 80s 350

[mattpiotr]

I got headers on my 86 gmc 4x4 2500 its got a strong 350 it has true duals with original 40s im starting to get a headache from the gaskets and collectors and flange and spark plug wires getting burnt and i cant run the plugs that i want. i want to switch to ram horn manifolds but before i do i want to find out some more on them? first off how are they? is their anything i should look for if i buy a used set? is their a cretin set i need for the 4 wheel drive? should i go with 2" or 2 1/2"? what are the good styles? and will it make my exhaust sound different? and anything things Thanks i found a set on summit but cant justify spending $299.99 for these http://www.summitracing.com/parts/AAF-ALL34200/